International Conference on Exotic Atoms and Related Topics - EXA2017

Europe/Vienna
Vienna

Vienna

Austrian Academy of Sciences Theatersaal Sonnenfelsgasse 19 1010 Vienna, Austria
Eberhard Widmann (Stefan Meyer Institute) , Johann Marton (Österreichische Akademie der Wissenschaften(ÖAW)) , Johann Zmeskal (SMI)
Description

Welcome to the registration for the EXA2017 conference. The EXA2017 is the 6th edition of the EXA conference series, and will take place in Vienna, Austria, from September 11th to 15th, 2017. It is organized by the Stefan-Meyer-Institute for Subatomic Physics of the Austrian Academy of Sciences.

The deadlines for abstract submission and registration are: Abstracts - extended to Sunday, April 30, 2017 Sunday, April 16, 2017 Registration - Sunday, July 30, 2017

The scientific program comprises the following topics:
* Antihydrogen: CPT and gravity
* Leptonic atoms: QED and gravity
* Kaon-nucleon and kaon-nucleus interaction
* Low-energy QCD
* Precision experiments with atoms, neutrons and charged particles
* Hadron physics with antiprotons
* Hadron physics at LHC
* Future facilities and instrumentation

The conference is sponsored by:
German JSPS Alumni Association

Hamamatsu Photonics Deutschland GmbH

Pfeiffer Vacuum Austria GmbH

World Scientific Publishing Co. Pte. Ltd.

 

Participants
  • Aaron Capon
  • Ales Cieply
  • Alexei Voronin
  • Amit Nanda
  • Anastasios Belias
  • Andrea Fioretti
  • Andrea Fontana
  • Andreas Pichler
  • Andrey Ivanov
  • Angela Gligorova
  • Angels Ramos
  • Annalisa Mastroserio
  • Antimo Palano
  • Anton Bogomyagkov
  • Arnaldo Vargas
  • Avraham Gal
  • Azam Ghaffari-tooran
  • Bastian Märkisch
  • Benjamin Dönigus
  • Bernadette Kolbinger
  • Carina Trippl
  • Carlo Guaraldo
  • Chen-Yu Liu
  • Chloé Malbrunot
  • Christian Carli
  • Christian Smorra
  • Claude Amsler
  • cody storry
  • Damir Bosnar
  • Daniel Mohler
  • Daniel Moser
  • David Cassidy
  • Deniz Mostarac
  • Dimitar Bakalov
  • Dominik Steinschaden
  • Eberhard WIDMANN
  • Eliahu Friedman
  • Eryk Czerwiński
  • Eugene Levichev
  • Francesco Guatieri
  • Gabriele-Elisabeth Koerner
  • Gertrud Konrad
  • Grant Riley
  • Hans Stroeher
  • Hartmut Abele
  • Henry Lamm
  • Hiroyuki Noumi
  • Horst Lenske
  • Ivana Belosevic
  • Jan Friedrich
  • Jaroslava Hrtankova
  • Jiri Mares
  • Joana Wirth
  • Johann Haidenbauer
  • Johann Marton
  • Johann Zmeskal
  • Joseph T K McKenna
  • kamal seth
  • Ken Suzuki
  • Kenkichi Miyabayashi
  • Kenta Miyahara
  • Klaus Jungmann
  • kristian piscicchia
  • kwame appiah
  • Lee Barnby
  • Magdalena Skurzok
  • Manfred Berger
  • Manuel Colocci
  • Mariana Nanova
  • Markus Moritz
  • Martin Simon
  • Masaki Hori
  • MEHMET CEM GUCLU
  • Michael Weber
  • Michal Silarski
  • Naofumi Kuroda
  • Naohito SAITO
  • Nicolaus Kratochwil
  • Niels Madsen
  • Nina Shevchenko
  • nora brambilla
  • Paolo Crivelli
  • Paul Buehler
  • Randolf Pohl
  • Rasulkhozha S. Sharafiddinov
  • Reinhard Alkofer
  • Renat Sultanov
  • Ryugo Hayano
  • Sadhana Dash
  • Scordo Alessandro
  • Sebastian Kalista
  • Sebastian Lehner
  • Sebastian Ratzenböck
  • Sebastian Templ
  • Sergey Salnikov
  • Shinji Okada
  • Shinya GONGYO
  • Shunzo Kumano
  • stefano piano
  • Steffen Maurus
  • Stephanie Roccia
  • Tadashi Hashimoto
  • Takahiro Nishi
  • Takuma Yamashita
  • Tetsuo Hyodo
  • Thomas Held
  • Thomas Madlener
  • Thomas Phillips
  • Tim Friesen
  • Tobias Jenke
  • Todd Pedlar
  • Torsten Soldner
  • Urs Wenger
  • Valeriy Yazkov
  • Vasiliki Mitsou
  • Vincenzo Cirigliano
  • Wolfram Weise
  • Yamoah Afrifa Kyei
  • Yasuhiro Ueno
  • Yasushi Kino
  • Yury Uzikov
  • Zhehui Wang
    • 17:00 19:00
      Reception and Registration at SMI 2.08

      2.08

      Vienna

      The reception takes place at the Stefan Meyer Institute, Boltzmanngasse 3, 1090 Vienna

    • 08:45 09:00
      Welcome

      Welcome by OEAW

      slides
    • 09:00 09:30
      CPT violation, Lorentz violation, and exotic atoms 30m
      Theories beyond the standard model of particle physics and general relativity can accommodate small deviations from Lorentz and CPT symmetry. The Standard Model-Extension is an effective field theory that was developed to facilitate the systematic search for Lorentz violation. Tests of Lorentz and CPT symmetry with exotic atoms such as antihydrogen, muonium, muonic hydrogen, and positronium offer some advantages compared to experiments with ordinary matter. Testable models for Lorentz and CPT violation have been obtained from the SME for atomic spectroscopy experiments and antimatter gravity tests. Experimental studies using these test models will advance our understanding and improve constraints on Lorentz and CPT violation with second-generation particles and antimatter.
      Speaker: Arnaldo Vargas (Indiana University)
      Slides
    • 09:30 10:00
      High-precision measurements of the antiproton's fundamental properties 30m
      The quantum-field theories, which are used in the Standard Model of particle physics to describe particles and their fundamental interactions, are invariant under the combined charge, parity, and time reversal (CPT) transformation. This fundamental symmetry requires conjugate particle/antiparticle pairs to have identical properties, such as charge-to-mass ratios, magnetic moments, or lifetimes. In return, the Standard Model can be challenged by performing high-precision comparisons of fundamental properties of conjugate particle-antiparticle pairs. Inspired by this principle, the BASE collaboration targets to increase the sensitivity of CPT invariance tests by comparing the fundamental properties of single protons and antiprotons in an advanced multi Penning trap system. Our recent experiments constitute the most precise measurements of the proton's magnetic moment with a relative uncertainty of 3.3 ppb, the proton-to-antiproton charge-to-mass ratios with a fractional precision of 69 ppt and the antiproton's magnetic moment with a resolution of 0.8 ppm. These measurements set the most stringent constraints on CPT-violating interactions using antiprotons, and test the standard model at an absolute energy scale of < 10-25 GeV and < 10-22 GeV, respectively. I will present an overview of our most recent results, and discuss prospects of BASE for the near future.
      Speaker: Dr Christian Smorra (RIKEN Fundamental Symmetries Laboratory)
      Slides
    • 10:00 10:30
      Laser spectroscopy of antiprotonic helium 30m
      Speaker: Dr Masaki Hori (Max-Planck Institute for Quantum Optics)
    • 10:30 11:00
      Coffee break 30m
    • 11:00 11:30
      The GBar experiment and a planned mea surement of the lamb shift in antihydrogen 30m
      Speaker: Paolo Crivelli (Institute for Particle Physics, ETH Zurich)
      Slides
    • 11:30 12:00
      Measurement of the hydrogen hyperfin e splitting - towards antihydrogenspectroscopy 30m
      Speaker: Dr Chloé Malbrunot (CERN)
      Slides
    • 12:00 12:30
      Observation of the 1S-2S transition in trapped antihydrogen 30m
      We report the first observation of an optical transition in atomic antimatter. The ALPHA experiment at CERN was designed to allow illumination of magnetically trapped antihydrogen for precision tests of fundamental symmetries. In this report we describe how we succeeded in detecting the resonant loss of antihydrogen when intense 243 nm laser light was tuned to be at resonance with the 1s to 2s transition in hydrogen. We describe how we use a cryogenic cavity enhanced frequency stabilized laser, and the significant improvements in the synthesis and trapping of antihydrogen that were critical to the success. Using a frequency stabilized 243 nm laser we have succeeded in, for the first time, exciting the 1s 2s transition in trapped antihydrogen. With on average about 14 atoms trapped, in 11 series of trials, we compared the antihydrogen remaining as well as escaping from the trap while exposing the atoms to intense laser light either on the presumed
      Speaker: Prof. Niels Madsen (Swansea University)
    • 12:30 14:00
      Lunch break 1h 30m
    • 14:00 14:30
      AEgIS - Latest results 30m
      The validity of the Weak Equivalence Principle (WEP) as predicted by General Relativity has been tested up to astounding precision using ordinary matter. The lack hitherto of a stable source of a probe being at the same time electrically neutral, cold and stable enough to be measured has prevented high-accuracy testing of the WEP on anti-matter. The AEgIS (Antimatter Experiment: Gravity, Interferometry, Spectroscopy) experiment located at CERN's AD (Antiproton Decelerator) facility aims at producing such a probe in the form of a pulsed beam of cold anti-hydrogen, and at measuring by means of a moiré deflectometer the gravitational force that Earth's mass exerts on it. Low temperature and abundance of the \bar H are paramount to attain a high precision measurement. A technique employing a charge-exchange reaction between antiprotons coming from the AD and excited positronium atoms is being developed at AEgIS and will be presented in the talk, alongside an overview of the experimental apparatus and the current status of the experiment.
      Speaker: Mr Francesco Guatieri (TIFPA - INFN)
      Slides
    • 14:30 15:00
      The ELENA deceleration ring at CERN ELENA 30m
      The CERN Antiproton Decelerator AD provides antiproton beams with the lowest possible kinetic energy 5.3 MeV possible with the given circumference of the machine to an active users community. The Extra Low Energy Antiproton ring (ELENA) is a small synchrotron with a circumference of 30.4 m, a factor 6 smaller than the AD, to further decelerate antiprotons from the AD from 5.3 MeV to 100 keV. Controlled deceleration in a synchrotron equipped with an electron cooler to reduce emittances in all three planes will allow the existing AD experiments to increase substantially their antiproton capture efficiencies and render new experiments possible. A status report on the ELENA project and, in particular, on ELENA ring commissioning taking place at present will be given.
      Speaker: Christian Carli (CERN)
      Slides
    • 15:00 15:30
      Hyperfine structure of antihydrogen 30m
      Speaker: Dr Naofumi Kuroda (University of Tokyo)
    • 15:30 16:00
      Coffee break 30m
    • 16:00 16:30
      The first result of presice muonium hyperfine measurement in J-PARC 30m
      MuSEUM is an international collaboration aiming at new precise measurements of the muonium hyperfine structure at J-PARC (Japan Proton Accelerator Research Complex). The new high intensity muon beam that will soon be available at Muon facility will provide an opportunity to improve the precision of these measurements by one order of magnitude. An overview of the different aspects of these new measurements, the current status of the preparation, and the results of commissioning test experiments at zero field are presented.
      Speaker: Yasuhiro Ueno (University of Tokyo)
    • 16:30 17:00
      Electrostatic manipulation of Rydberg positronium atoms 30m
      Experiments using positronium (Ps) atoms are often complicated by low numbers of atoms, and the fact that they self-annihilate in around 142 ns (for the “long-lived” states). The latter problem can be avoided if the atoms are optically excited to long-lived Rydberg states, which don’t annihilate to any significant degree. This has become much easier to accomplish in recent years using positron bugger gas trapping technology [1], allowing the efficient production of Rydberg Ps atoms [2]. As well as increasing their lifetime, exciting Ps atoms to Rydberg levels also makes it possible to manipulate them using electric fields because of their large dipole moments [3]. Here I will report the first demonstration of such manipulation of Ps atoms [4], and discuss future applications, including precision spectroscopy of Rydberg Ps levels. If it can be performed with sufficiently high precision, this may be of relevance to the proton radius problem [5], since Ps is composed only of leptons. References [1] J.R. Danielson et al., Rev. Mod. Phys. 87, 247 (2015). [2] D. B. Cassidy et al., Phys. Rev. Lett. 108, 043401 (2012). [3] T.E. Wall, et al., Phys. Rev. Lett. 114, 173001 (2015). [4] A. Deller, et al., Phys. Rev. Lett. 117, 073202 (2016). [5] R. Pohl et al., Ann. Rev. Nucl. Part. Sci. 63 175 (2013).
      Speaker: Dr David Cassidy (UCL)
      Slides
    • 17:00 17:30
      A revised value of the Rydberg constant from muonic and electronic atoms 30m
      Laser spectroscopy of muonic hydrogen [1,2] yielded a proton rms charge radius which is 4% (or ~6 sigmas) smaller than the CODATA value [3]. Also the deuteron charge radius from muonic deuterium [4] is 6 sigmas smaller than the CODATA value, but consistent with the smaller proton inside the deuteron. These smaller charge radii, when combined with precision measurements of the 1S-2S transitions in regular (electronic) hydrogen [5] and deuterium [6], yield a 6 sigmas smaller value of the Rydberg constant [7], compared to the CODATA value. In this talk I will report about a new measurement of the Rydberg constant from the 2S-4P transition in regular hydrogen performed in Garching [8], which supports the smaller, "muonic" value. I will also discuss the measurements in muonic hydrogen, deuterium, and helium, and the consequences for the "proton radius puzzle". [1] Pohl et al. (CREMA Coll.), Nature 466, 213 (2010) [2] Antognini et al. (CREMA Coll.), Science 339, 417 (2013) [3] Mohr et al. (CODATA 2014), Rev. Mod. Phys. 88, 035009 (2016) [4] Pohl et al. (CREMA Coll.), Science 353, 669 (2016) [5] Parthey et al., PRL 107, 203001 (2011) [6] Parthey et al., PRL 104, 233001 (2010) [7] Pohl et al., Metrologia 54, L1 (2017) [8] Beyer et al., submitted (2017).
      Speaker: Dr Randolf Pohl (Max-Planck-Institut für Quantenoptik)
    • 09:00 09:30
      Experimental study of hyperon resonances below the KbarN thresold at J-PARC 30m
      Lambda(1405) is a well-known hyperon resonance with the spin/parity of 1/2-. According to PDG, its mass and width are 1405.1(+1.3-1.0) MeV and 50 MeV [1], Its light mass, located at 27 MeV below the KbarN mass threshold, arises a basic idea of possible deeply bound kaonic nuclear states [2]. On the other hand, there is a longstanding argument if Lambda(1405) has a so-called double-pole structure, comprizes pi-Sigma and KbarN states [3,4,5]. In particular, a chiral unitary model calculation claims that the pole coupled to the KbarN state is located at about 1426 MeV [4], much closer to the KbarN mass threshold. In order to confirm the pole structure, it is desired to measure the S-wave KbarN scattering amplitude in the isospin equal to 0 channel below the KbarN threshold. We therefore proposed an experiment via the (K-,n) reaction on deuteron at the K1.8BR beam line of J-PARC [6]. In the reaction, an incident negative kaon of 1 GeV/c knocks out a neutron at a forward angle and a recoilled kaon reacts with a residual nucleon. The d(K-,n) reaction is expected to enhance the S-wave KbarN scattering even below the KbarN threshold due to a small momentum transfer of about 200 MeV/c. Missing mass spectra of pi+-Sigma-+,pi0Sigma0, and pi-Sigma0 in the d(K-,n) and d(K^-,p) reactions were measured. We will discuss the line shapes of the measured spectra to deduce information on a resonance coupled to the KbarN channel below the KbarN thresold. [1] C. Patrignani et al. (Particle Data Group), Chin. Phys. C40, 100001(2016). [2] Y. Akaishi and T. Yamazaki, Phys. Rev. C65, 044005(2002); Y. Akaishi and T. Yamazaki, Phys. Lett.. B535, 70(2002). [3] J.A. Oller and U.-G. Meissner, Phys. Lett. B500, 263(2001). [4] D. Jido, J. A. Oller, E. Oset, A. Ramos, and U.-G. Meissner, Nucl. Phys. A725, 181(2003). [5] T. Hyodo and W. Weise, Phys. Rev. C77, 035204(2008). [6] H. Noumi et al., J-PARC E31 Proposal, 2009
      Speaker: Prof. Hiroyuki Noumi (Research Center for Nuclear Physics, Osaka University)
    • 09:30 10:00
      Kaonic nuclei studied via K- induced reactions at J-PARC 30m
      The existence of kaonic nuclear states has not been established so far, despite the many efforts in both theoretical and experimental sides. Recent concerns are focusing on the simplest kaonic nuclear state, KbarNN, which is predicted to be bound by almost all theoretical studies. Experimentally, there are some reports on peak structure observations at ∼100 MeV below KbarNN threshold, but they are too deep to be understood theoretically. Our experimental approach in J-PARC E15 is to take advantage of K- induced reactions at 1 GeV/c on helium-3 target. In this reaction, a neutron knockout is dominant, where the momentum transfer is rather small ( ~200 MeV/c). Therefore, one can expect the KbarNN state could be efficiently formed. In 2013, we took first physics data at J-PARC K1.8BR beamline. We investigated the formation reaction in the neutron missing-mass spectrum at very forward angle [PTEP(2015)061D01] and the KbaNN decay in the Lambda p invariant-mass spectrum [PTEP(2016)051D01]. While we did not observe significant structure in the deep binding region ~ 100 MeV, we found a peak-like structure around the threshold in the Lambda p invariant-mass spectrum. Therefore, in 2015, we performed the second experiment to further investigate the structure observed. The larger data sample allows us to perform detailed analysis such as the reaction angular dependence, which could lead to the first convincing evidence of the KbarNN bound state. In this contribution, we will report the latest result of the Lambda p invariant-mass study. Analysis status of other channels and our future prospect will be also discussed.
      Speaker: Dr Tadashi Hashimoto (JAEA)
    • 10:00 10:30
      A study of the in-flight 3He(K-,Lambdap)n reaction and the “K-pp” bound state 30m
      A theoretical investigation is done to clarify the origin of the peak structure observed near the K- pp threshold in the in-flight 3He(K-, Lambda p)n reaction of the J-PARC E15 experiment, which could be a signal of the lightest kaonic nuclei, that is, the KbarNN (I=1/2) state. We employ modern KbarN interactions within a Fadeev-based approach and find that the experimental signal is qualitatively well reproduced by the assumption that, after the emission of the energetic neutron, a KbarNN bound state is formed, decaying eventually into a Lambda p pair. We discard a possible interpretation in terms of the formation of a uncorrelated Lambda(1405) p state.
      Speaker: Prof. Angels Ramos (University of Barcelona)
    • 10:30 11:00
      Coffee break 30m
    • 11:00 11:30
      Low energy interaction studies of negative kaons in light nuclear targets by AMADEUS 30m
      The AMADEUS experiment investigates the low energy interaction of negative kaons with nucleons and light nuclei, aiming to solve longstanding open problems in the non-perturbative strangeness QCD sector. We take advantage of the low momentum ($p_K\sim$127 MeV/c) almost monochromatic charged kaons produced by the DA$\Phi$NE collider, in order to study the K$^-$ hadronic capture in the materials of the KLOE detector. The experimental data corresponds to the 1.64 fb$^-1$ luminosity of the 2004-2005 KLOE data taking campaign, which contains high statistics samples of K$^-$ nuclear captures (both at-rest and in-flight) in H, ${}^4$He, {}^9$Be and {}^12$C. We will present the results obtained from the analysis of hyperon-pion correlated production, to explore the behaviour of Y$^*$ resonances in nuclear environment. The investigation of $K^-$-multi nucleon capture and bound states formation through the decay in hyperon-proton, deuteron, and triton will be shown as well.
      Speaker: Dr kristian piscicchia (LNF INFN CENTRO FERMI)
      Slides
    • 11:30 12:00
      Constraining the antikaon-nucleon interaction from the 1S level shift of kaonic deuterium 30m
      Motivated by the precise measurement of the 1S level shift of kaonic hydrogen, we perform accurate three-body calculations for the spectrum of kaonic deuterium using a realistic antikaon-nucleon (KbarN) interaction. In order to describe both short- and long-range behavior of the kaonic atomic states, we solve the three-body Schroedinger equation with a superposition of a large number of correlated Gaussian basis functions covering distances up to several hundreds of fm. Transition energies between 1S, 2P and 2S states are determined with high precision. The complex energy shift of the 1S level of kaonic deuterium is found to be 670−i508 eV. The sensitivity of this level shift with respect to the isospin I=1 component of the KN interaction is examined. It is pointed out that an experimental determination of the kaonic deuterium level shift within an uncertainty of 25% will provide a constraint for the I=1 component of the KN interaction significantly stronger than that from kaonic hydrogen.
      Speaker: Prof. Wolfram Weise (ECT* and TU Munich)
      Slides
    • 12:00 12:30
      Single- and multi-nucleon $K^-$ interactions with nuclei near threshold 30m
      Six recent SU(3) chiral-model EFT approaches to the $\bar K$-nucleon interaction are constrained by $K^-p$ low-energy scattering and reaction data and by the kaonic hydrogen SIDDHARTA experiment. However, the resulting $K^- N$ scattering amplitudes turn out to be strongly model-dependent when extrapolating to energies below threshold. The models studied predict widely different amplitudes for neutrons also above threshold. Strong-interaction observables in kaonic atoms depend on $K^-$-nucleon interaction below threshold. Good agreement with the world-data on kaonic atoms is achieved with the above models only when $\bar K N$ amplitudes are supplemented by phenomenological multi-nucleon terms. Branching ratios for absorption-at-rest of $K^-$ mesons on nuclei, from old bubble chamber experiments, are used as additional data in the analysis of kaonic atoms. The results unequivocally favor only two of the above six models, thus it is possible for the first time to base on experiment the relative strengths of state-of-the-art single-nucleon and multi-nucleon terms in the $K^-$-nucleus potentials. The nuclear densities that are being probed by these experiments are also well defined. From potentials that fit both conventional data on kaonic atoms and branching ratios of single-nucleon absorption-at-rest we are able to make some general statements on low-energy $K^-$ interaction with nuclei.
      Speaker: Prof. Eliahu Friedman (Racah Inst. Physics, Hebrew University, Jerusalem, Israel)
      Slides
    • 12:30 14:00
      Lunch break 1h 30m
    • 14:00 18:00
      Parallel P1 & P2
      • 14:00
        Antihydrogen gravitational mass via precision studies of antihydrogen gravitational quantum states. 20m
        We propose a method of study of quantum states of antihydrogen atom in the Earth gravitational field near material surface which benefits from spectroscopy and interferometry of such states. We study the main false effects and show that the estimated accuracy of gravitational to inertial mass ratio for antihydrogen in the developed approach could be better than 0.0001 for 1000 antiatoms used. An essential increase in the precision of gravitational mass measurement is due to more than one order of magnitude increase in the lifetime of antihydrogen gravitational states above surfaces covered with liquid He film.
        Speaker: Dr Alexei Voronin (P.N. Lebedev Physical Institute)
        Slides
      • 14:20
        Test of time-reversal invariance in antiproton-deuteron scattering 20m
        The integrated cross section of double polarized pd-scattering with transverse polarization of the proton ($P_y$) and tensor polarization ($P_{xz}$) of the deuteron constitutes a null-test signal of the time-invariance violating P-parity conserving (TVPC) effects $\widetilde\sigma$ [1]. Experimental search of this signal is planned at COSY at proton beam energy 135 MeV [2]. Theoretical study of the energy dependence of this signal for several type of phenomenological TVPC NN- interactions was done within the Glauber theory in [3] for the S-wave approximation and in [4] with the deuteron D-wave included. In both cases the Coulomb interaction was taken into account and its contribution to $\widetilde\sigma$ is found to be rather small. However, the S-D interference is destructive and very important [4]. Evidently, the integrated cross section of the polarized ($P_y$) antiproton scattering off the tensor polarized ($P_{xz}$) deuteron also provides a null-test signal of the TVPC effects. One may assume that TVPC $\bar NN$-interaction contains the same operator structure as the $NN$-interaction except the charge-exchange term $\bar p p\to \bar n n$.However, due to difference between strong NN- and antip N- scattering amplitudes the energy dependence of the null test signal in pd- and anti-pd- interaction has to be different. In the present work these properties will be discussed on the basis of the calculations within the spin-dependent Glauber model [5] using the \bar p N-scattering amplitudes from Ref. [6]. [1] Н.Е.Conzett, Phys. Rev. C 48 (1993) 423. [2] P.D. Eversheim, B. Lorenz, Yu.Valdau (spokepersons), COSY Proposal No 25 [http://apps.fz-juelich.de/pax/paxwiki/ images/8/8c/215-TRRI-Prop_sum.pdf] [3] Yu. N.Uzikov, A.A. Temerbayev, Phys. Rev. C 92 (2015) 014002. [4] Yu. N.Uzikov, J.H. Haidenbauer, Phys. Rev. C 94 (2016) 035501. [5] Yu. N.Uzikov, J.H. Haidenbauer, Phys. Rev. C 88 (2013) 027001. [6] D. Zhou, R.G. E. Timmermans, Phys. Rev. C 86 (2012) 044003.
        Speaker: Prof. Yury Uzikov (Joint Institute for Nuclear Researches)
        Slides
      • 14:40
        Hyperfine spectroscopy in the ALPHA experiment 20m
        Precision hyperfine spectroscopy of antihydrogen is one of the primary goals of the ALPHA experiment. In hydrogen, the zero-field ground-state hyperfine splitting frequency has been measured to better than 1 part in 10^12 [1]. A measurement of a similar precision on antihydrogen would provide an extremely precise test of CPT symmetry. An initial proof-of-principle experiment was performed in 2012 demonstrating the ability to excite positron spin resonance transitions in ground state antihydrogen [2]. In this talk, I will present the tools we have developed to study antihydrogen's hyperfine structure and the results of ALPHA's latest hyperfine spectroscopy experiments. [1] IEEE Trans. Instrum. Meas. IM-19, 200 (1970); Nature 229 110 (1970). [2] Amole et al., Nature 483, 439 (2012).
        Speaker: Tim Friesen (Aarhus University)
        Slides
      • 15:00
        A Detector for Measuring the Ground State Hyperfine Splitting of Antihydrogen 20m
        The ASACUSA Collaboration at CERNs Antiproton Decelerator plans to measure the ground state hyperfine splitting of antihydrogen with high precision to test the combined fundamental symmetry of charge conjugation, parity transformation, and time reversal. The antihydrogen atoms are created in a double CUSP trap [1], where antiprotons and positrons are mixed. The antiatoms then enter a Rabi-like spectrometer line [2] where at the end the annihilation signal is recorded by a detector which will be the focus of this contribution. The challenging task of the detector is to distiguish background events such as cosmic particles and upstream annhilations from antiproton annihilations originating from antihydrogen atoms which are produced only in small amounts. The antihydrogen detector is composed of a position sensitive central detector and a surrounding hodoscope [3] for tracking charged annihilation products. The hodoscope is made up of two layers of plastic scintillators which are read out by silicon photo multipliers with pre-amplifier electronics. Its excellent time resolution allows to differentiate particles coming from inside from those traversing the detector from outside. For beamtime 2017 an upgrade has been carried out using scintillating fibres, improving the hodoscopes position resolution in beam direction and enabling tracking in three dimensions and precise vertex reconstruction. Furthermore, preliminary results of last years beamtime will be included, during which direct extractions of antiprotons to the detector have been done in order to study the antiproton annihilation signal. [1] N. Kuroda et al. (2014). A source of antihydrogen for in-flight hyperfine spectroscopy. Nature Communications, 5,3089 [2] C. Malbrunot et al. (2014). Spectroscopy apparatus for the measurement of the hyperfine structure of antihydrogen. Hyperfine Interactions, 228, 61–66 [3] C. Sauerzopf et al. (2016). Annihilation Detector for an In-Beam Spectrsocopy Apparatus to Measure the Ground State Hyperfine Splitting of Antihydrogen. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, A845, 579-582
        Speaker: Ms Bernadette Kolbinger (Stefan Meyer Institute for Subatomic Physics, Austrian Academy of Sciences, Boltzmanngasse 3, 1090 Vienna, Austria)
        Slides
      • 15:20
        Detection of antihydrogen – A Vertexing Detector overview for the ALPHA 20m
        The aim of the ALPHA experiment at CERN is to trap cold atomic antihydrogen, study its properties, and ultimately to perform precision comparison between the hydrogen and antihydrogen atomic spectra. Recently the collaboration has reached important milestones beginning with demonstrating the ability to trap and confine neutral cold antihydrogen [1][2], setting new limits on the charge of antihydrogen [3], and performing spectroscopic measurements of antihydrogen [4][5]. The principle tool for antihydrogen detection in the ALPHA experiment is a Silicon Vertex Detector (SVD) composed of 72 double-sided silicon strip hybrid modules designed to surround the neutral atom trap. Recently upgraded [7], the SVD is used to image single annihilation events, and reconstruct spatial and timing data of antiproton annihilations. The detector performance can be optimised for various physics applications. This ranges from extreme low background suppression for counting experiments, to high signal acceptance and accurate vertex reconstruction used for collective plasma behaviour studies, giving insight into the formation processes of antihydrogen. A description of the SVD performance, characteristics, and an overview of applications in the ALPHA experiment will be given. The presentation will cover a summary of recent results, improvements to analytical methods leading to near order of magnitude reduction in background signal and outlook for probing antihydrogen formation.
        Speaker: Dr Joseph T K McKenna (TRIUMF)
      • 15:40
        Coffee break 20m
      • 16:00
        Predicting and Discovering True Muonium 20m
        The recent observation of discrepancies in the muonic sector motivates searches for the yet undiscovered atom true muonium ($\mu^+\mu^-$). To leverage potential experimental signals, precise theoretical calculations are required. I will present the on-going work to compute higher-order corrections to the hyperfine splitting and the Lamb shift. Further, possible detection in rare meson decay experiments like REDTOP and using true muonium production to constrain mesonic form factors will be discussed.
        Speaker: Dr Henry Lamm (University of Maryland)
        Slides
      • 16:20
        Exotic atoms at extremely high magnetic fields: the case of Neutron Stars atmosphere 20m
        The presence of exotic states of matter in neutron stars (NS) is currently an open problem in physics: the appearance of muons, kaons, hyperons and other exotic particles is thought to happen in the inner regions of the NS due to energetic considerations and is considered as an effective mechanism to soften the equation of state (EoS) [1, 2]. In the so-called two-families scenario [3, 4], in which NS co-exist with quark stars, NS can be very compact and have a maximum mass of about 1.5−1.6M⊙, while quark stars can have large radii and be even more massive, up to 2.75 M⊙. The increasing softening of the EoS allows to reach very small radii for the star that becomes unstable and converts into a quark star. The process of conversion of a NS into a quark star proceeds in two phases: a first rapid burning followed by a much slower combustion. During this second phase, material can be ablated by neutrinos from the surface of the star. This is particularly interesting, since it opens the possibility of ejecting in the atmosphere not only neutron-rich nuclei, but also more exotic material such as hypernuclei. In this way, the atmosphere of a quark star could be radically different from the atmosphere of a NS. This offers a chance to distinguish between these two types of compact stars, providing a relevant feature that can be tested in observations and thus deserves to be investigated theoretically. In the NS atmosphere and surface traditional atoms from hydrogen to iron exist and their atomic spectra are observed, but also exotic atoms like (p µ−) or (Σ+ e−) could be present and in this talk we propose to investigate this topic. In particular, the spectroscopy of exotic atoms, made in the simplest case by two Fermions like (p µ−) or (Σ+ e−), can be inferred by the results obtained for hydrogen or hydrogen-like atoms in the extremely high magnetic field B of the NS, possibly exceeding 10^9 T. It is expected that, at these remarkably high magnetic fields, atoms are of cylindrical shape and that the traditional level structure observed in terrestrial experiments (gross, fine, hyperfine) is superseded by a much simpler structure (Landau levels) with only two quantum numbers: m that describes the radial excitations and ν that quantizes the motion along B. The analytical expressions of the wave functions and eigenvalues of these levels have been calculated at present only for hydrogen and in this original work we extend the existing solutions and parametrizations to the exotic atoms (p µ−) or (Σ+ e−), making some predictions on possible transitions that could be detected in the spectra of NS. References [1] Glendenning, N. K., Compact stars: Nuclear physics, particle physics and general relativity, Springer Science & Business Media, 2012. [2] Haensel, P., Potekhin, A. Y., Yakovlev, D. G., Neutron stars 1: Equation of state and structure, Springer Science & Business Media, 2007. [3] Drago, A., Lavagno, A., Pagliara, G., Pigato, D., The scenario of two families of compact stars. Part 1. Equations of state, mass-radius relations and binary systems, European Physical Journal A, 52, 40., 2016. [4] Drago, A., Pagliara, G., The scenario of two families of compact stars. Part 2: Transition from hadronic to quark matter and explosive phenomena, European Physical Journal A, 52, 41., 2016.
        Speaker: Dr Andrea Fontana (INFN Pavia)
        Slides
      • 16:40
        Precision study of the E2 spectrum of the hydrogen molecular ion H2+ 20m
        The electric quadrupole E2 spectrum of the hydrogen molecular ion H2+ is considered in details. The dependence on the laser polarization and the sensitivity to external magnetic fields is thoroughly studied with full account of the hyperfine structure of the molecular ion.
        Speaker: Prof. Dimitar Bakalov (Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences)
        Slides
      • 17:00
        Studies of discrete symmetries in decays of positronium atoms 20m
        If the Nature was utterly symmetric the matter would not exist. Yet, processes driven by the gravitational, electromagnetic and strong interactions seem to be symmetric with respect to reflection in space (P), reversal in time (T) and charge conjugation (C). So far violations of these symmetries were observed only in processes governed by the weak interaction. Interestingly, though the matter which we know is made of quarks and leptons, violation of CP and T symmetries have been observed only for systems including quarks, and it has not yet been discovered in any processes involving purely leptonic matter. Positronium is the lightest purely leptonic object decaying into photons. As an atom bound by a central potential, it is a parity eigenstate, and as an atom built out of an electron and an anti-electron, it is an eigenstate of the charge conjugation operator. Therefore, the positronium is a unique laboratory to study discrete symmetries whose precision is limited, in principle, by the effects due to the weak interactions expected at the level of 10^−14 and photon–photon interactions expected at the level of 10^−9. The newly constructed Jagiellonian Positron Emission Tomograph (J-PET) enables to perform tests of discrete symmetries in the leptonic sector via the determination of the expectation values of the discrete-symmetries-odd operators, which may be constructed from the spin of ortho-positronium atom and the momenta and polarization vectors of photons originating from its annihilation. We will present the potential of the J-PET detector to test the C, CP, T and CPT symmetries in the decays of positronium atoms and report on results from the first data-taking campaigns. J-PET built of plastic scintillators, provides superior time resolution, high granularity, low pile-ups, and opportunity of determining photon’s polarization. These features allow us to expect a significant improvement in tests of discrete symmetries in decays of positronium atom (a purely leptonic system). J-PET: P. Moskal et al., Acta Phys. Polon. B47 (2016) 509. J-PET: A. Gajos et al., Nucl. Instrum. Meth. A819 (2016) 54. J-PET: D. Kamińska et al., Eur. Phys. J. C76 (2016) 445. J-PET: P. Moskal et al., Phys. Med. Biol. 61 (2016) 2025. J-PET: P. Moskal et al., Nucl. Instrum. Meth. A775 (2015) 54. J-PET: P. Moskal et al., Nucl. Instrum. Meth. A764 (2014) 317. J-PET: J. Smyrski et al., Nucl. Instrum. Meth. A851 (2017) 39.
        Speaker: Dr Eryk Czerwiński (Institute of Physics, Jagiellonian University)
        Slides
      • 17:20
        muCool: Development of a novel high-brightness low-energy muon beamline 20m
        The next generation experiments with muons and muonium atoms require muon beams with low energy, small transverse size and high intensity. At the Paul Scherrer Institute we are developing a novel device that reduces the phase space of a standard \mu^{+} beam by a factor of 10^{10} with 10^{-3} efficiency. The phase space compression is achieved by stopping \mu^{+} in cryogenic helium gas and applying strong electric and magnetic fields and gas density gradients. The beamline consists of several consecutive stages. The compression has already been demonstrated for each stage individually. The measurements show that we can achieve a muon beam compression with a high efficiency within few microseconds, as predicted by the simulations. In the next step, we will merge the various stages and extract the compressed muon beam from the gas into the vacuum. This work is supported by SNF grant 200020_172639.
        Speaker: Ms Ivana Belosevic (Institute for Particle Physics, ETH Zurich)
        Slides
      • 17:40
        First Positrons from the McMaster Intense Positron Beam Facility (MIPBF) 20m
        The McMaster Intense Positron Beam Facility (MIPBF) is a new research reactor based e+ source for atomic physics and materials science. In this prelimary operation, decay gamma’s from the reactor core are incident on a platinum foil in vacuum. Pair production provides electrons and positron in the foil which also acts as a moderator, thermalizing many of the e+ to low energy. Such thermal positrons are ejected from the foil and are accelerated away from the core with an applied electric potential of ~10V. These low energy e+ as well as a much larger number of higher energy, unmoderated positrons are guided using magnetic fields out of the pool and external biological shielding block for experiments. Positrons passing through an aperture are incident on a target and annihilate into back-to-back gamma photons for coincident detection in NaI (Ti) scintillation crystal detectors. Varying electric potentials and magnetic fields throughout the 5 meter path allows study of the e+ beam properties. In this initial test, a moderated positron beam energy width of <10eV is measured in a cm radius beam, well suited for the buffer gas accumulator that has been assembled for this facility. In addition to these low energy particles we observe a 10 times higher rate of unmoderated e+ with energies near 100keV. This secondary beam may be remoderated to enhance the low energy e+ for trapping. It is also well suited for defect studies of surfaces or in bulk matter for materials science, also a part of this user facility. Initial estimates of this source scaled to full reactor activity indicate that the design rate of ~109 moderated e+/second should be achievable with an additional more intense component at higher energies.
        Speaker: Prof. cody storry (York University)
    • 14:00 18:00
      Parallel P3 & P4
      • 14:00
        Quasi-bound state in the antiKNNN system 20m
        An exotic system consisting of an antikaon and three nucleons will be considered. A search of a quasi-bound state in the system will be performed using four-body Faddeev-type equations. Different antiKN potentials will be used for studying dependence of the results on the two-body input.
        Speaker: Dr Nina Shevchenko (Nuclear Physics Institute)
        Slides
      • 14:20
        Calculations of antiproton-nucleus quasi-bound states based on the Paris $\bar{N}N$ potential. 20m
        This contribution deals with our recent study of antiproton-nucleus quasi bound states [1] using the latest version of the Paris $\bar{N}N$ potential [2]. We construct the pbar-nucleus optical potential based on the related S- and P-wave scattering amplitudes. The free amplitudes are modified by multiple scattering approach in order to account for Pauli correlations in the medium [3]. We discuss the energy dependence of the optical potential and evaluate the corresponding $\bar{p}$ binding energies and widths in selected nuclei by solving the Dirac equation. The S-wave Paris potential yields similar spectra of $\bar{p}$ bound states as the phenomenological potential accounting for $\bar{p}$ atom data [4], but larger $\bar{p}$ widths. Next, we discuss the effect of the P-wave interaction and the implications for the antiproton-nucleus quasi-bound states. References: [1] J. Hrtankova, J. Mares, Proceedings of 12th International Conference on Low Energy Antiproton Physics (LEAP 2016), JPS Conference Proceedings, in print. [2] B. El-Bennich, M. Lacombe, B. Loiseau and S. Wycech, Phys. Rev. C 79 (2009) 054001. [3] T. Wass, M. Rho and W. Weise, Nucl. Phys. A 617 (1997) 449. [4] J. Hrtankova, J. Mares, Nucl. Phys. A 945 (2016) 197.
        Speaker: Ms Jaroslava Hrtankova (Nuclear Physics Institute, Rez, Czech Republic)
        Slides
      • 14:40
        The kaonic atoms research program at DAFNE: from SIDDHARTA to SIDDHARTA-2 20m
        The interaction of antikaons with nucleons and nuclei in the low-energy regime represents an active research field in hadron physics with still many important open questions. The investigation of light kaonic atoms, in which one electron is replaced by a negatively charged kaon, is a unique tool to provide precise information on this interaction; the energy shift and the broadening of the low-lying states of such atoms, induced by the kaon-nucleus hadronic interaction, can be determined with high precision from the atomic X-ray spectroscopy, and this experimental method provides unique information to understand the low energy kaon-nucleus interaction at the production threshold. The lightest atomic systems, like the kaonic hydrogen and the kaonic deuterium deliver, in a model-independent way, the isospin-dependent kaon-nucleon scattering lengths. The most precise kaonic hydrogen measurement to-date, together with an exploratory measurement of kaonic deuterium, were carried out in 2009 at the DAFNE collider, by the SIDDHARTA collaboration at the electron-positron collider DAFNE of LNF-INFN, combining the excellent quality kaon beam delivered by the collider with new experimental techniques, as fast and very precise X ray detectors, like the Silicon Drift Detectors. The SIDDHARTA result triggered new theoretical work, which achieved major progress in the understanding of the low-energy strong interaction with strangeness reflected by the antikaon-nucleon scattering lengths calculated with the antikaon-proton amplitudes constrained by the SIDDHARTA data. The most important open question is the experimental determination of the hadronic energy shift and width of kaonic deuterium; presently, a major upgrade of the setup, SIDDHARTA-2, is being realized to reach this goal. In this talk, the SIDDHARTA-2 experiment, together with the most recent experimental results and the future projects of X-ray spectroscopy of light kaonic atoms are presented.
        Speaker: Dr Alessandro Scordo (LNF-INFN)
        Slides
      • 15:00
        X-ray spectroscopy of kaonic atoms with cryogenic detectors 20m
        The HEATES collaboration aims to pioneer the next-generation high-resolution x-ray spectroscopy of hadronic atoms. We use a novel cryogenic x-ray spectrometer: an array of superconducting transition-edge-sensor (TES) microcalorimeters, offering unprecedented full-width-at-half-maximum energy resolution of 2 - 3 eV at 6 keV. The 240 pixel spectrometer array will have a large collecting area of about 20 mm^2 thanks to recent technological advances in multiplexed readout of TES multi-pixel arrays [1]. This will open a new door to investigate kaon-nucleus strong interactions. A kaonic atom is a Coulomb-bound system formed by a kaon, electrons, and a nucleus. Effects of the strong interaction between the kaon and atomic nucleus are experimentally extracted from characteristic x-ray-emission spectra of the most tightly bound energy levels that are the most perturbed by the strong force (e.g., [2-4] are recent measurements). Therefore, many experiments have collected data on a variety of targets [5]; however, the energy resolution of the conventional semiconductor spectrometers employed in these experiments is insufficient to see the small spectral effects due to the strong interaction. As a result, the depth of the K^- - nucleus potential at zero energy remains unknown. This is closely related to the investigation of bound states of the kaon to the nucleus and is one of the greatest problems today in strangeness nuclear physics [6]. Aiming to provide a breakthrough, we will measure the 3d-2p x-rays of kaonic helium-3 and helium-4 (6.2 keV and 6.4 keV, respectively) using arrays of the TES microcalorimeters, and determine the strong-force shifts in those 2p levels with a precision of 0.2 eV to distinguish between the two leading antikaon-nucleus strong-interaction models, J-PARC E62 [7]. We have conducted a pathfinding experiment by measuring pionic-atom x rays with a 240-pixel TES array at the Paul Scherrer Institut (PSI), and successfully demonstrated the feasibility of TES-based exotic-atom x-ray spectroscopy in a hadron-beam environment [8,9]. Recently we performed an experiment at the actual kaon beamline of J-PARC (K1.8BR) as a commissioning run. Kaon stop tuning and TES detector commissioning have been performed [10]. In this presentation we will give an overview of this project and present preliminary results of experiments at PSI and J-PARC. [1] J.N. Ullom et al., Synchrotron Radiation News 27 (2014) 24. [2] S. Okada et al., Phys. Lett. B 653 (2007) 387-391. [3] SIDDHARTA collaboration, Phys. Lett. B 697 (2011) 199-202. [4] SIDDHARTA collaboration, Phys. Lett. B 704 (2011) 113-117. [5] C.J. Batty, E. Friedman, A. Gal, Phys. Rep. 287 (1997) 385-445. [6] A. Gal, Nucl. Phys. A 914 (2013) 270-279. [7] https://j-parc.jp/researcher/Hadron/en/pac_1507/pdf/P62_2015-6.pdf [8] S. Okada et al., Prog. Theor. Exp. Phys. (2016) 091D01. [9] H. Tatsuno et al., J Low Temp Phys, 184 (2016) 930-937. [10] T. Hashimoto et al., IEEE Transactions on Applied Superconductivity, 27, 4 (2017) 1-5.
        Speaker: Dr Shinji Okada (RIKEN)
        Slides
      • 15:20
        Kaon and Phi Production in Pion-Nucleus Reactions at 1.7 GeV/c* 20m
        The production and properties of open and hidden strange hadrons ($K^+$, $K^-$ and $\phi$) in cold nuclear matter generated in pion-nucleus reactions ($\pi^- + A$, $A = C, W$) at $p_{\pi^-}= 1.7$~GeV/c has been investigated with the HADES setup (SIS18/GSI).\\ Exploring the modification of the (anti-)kaon spectral function in nuclear matter which should be already apparent at finite baryon densities is of particular interest. While, for the kaon ($K^+, K^0$) the repulsive $KN$-potential has been studied to some extent having a moderate strength ($20-40$~MeV), the existing data on in-medium effects of the antikaon produced off nuclear targets are very scare. Moreover, the $K^-$ can be absorbed in nuclear medium which should be driven by strangeness exchange processes on one ($K^- N\rightarrow Y\pi$) or more nucleons ($K^- NN\rightarrow YN\pi$). On the contrary, $K^+$ is not affected by strong absorption processes and can be treated as a quasi particle within nuclear matter, providing stringent constraints on the production mechanism of strange hadrons. In this context, also the $\phi$ production and absorption ($\phi\rightarrow K^+ K^-$, $BR \sim 48.9$\%) off light and heavy nuclear targets is studied.\\ In this talk, we are presenting evidence of the $K^-$ absorption on the basis of the $K^-/K^+$ ratios in both nuclear environments (C, W). In addition, the $\phi$ absorption in a nuclear medium is discussed by comparing the production off carbon and tungsten as well as the $K^-$ production in terms of the $\phi$ feed-down. \newline \newline * supported by the DFG cluster of excellence "Origin and Structure of the Universe" and SFB 1258
        Speaker: Ms Joana Wirth (TU München)
        Slides
      • 15:40
        Coffee break 20m
      • 16:00
        KbarN-piSigma coupled-channels potential derived from Chiral SU(3) dynamics 20m
        In this talk, the derivation of a KbarN-piSigma coupled-channels potential from chiral SU(3) dynamics will be presented. Recently, precise experimental data of the energy shift of kaonic hydrogen have been obtained by SIDDHARTA. Thanks to these data, the uncertainty of the KbarN scattering amplitude has been significantly reduced below the KbarN threshold, which leads to the quantitative description of the Lambda(1405) and the subthreshold KbarN interaction. For the application to the few-body kaonic nuclei, we previously established a potential construction method based on chiral SU(3) dynamics, respecting the properties of the scattering amplitude in the complex energy plane, and derived a KbarN signle-channel effective potential that incorporates the piSigma channel. Extending this method to include the piSigma channel explicitly, we now proceed to construct a KbarN-piSigma coupled-channels potential, motivated by the fact that dynamical effects of the piSigma channel are expected to be particularly important in the energy region around the piSigma threshold. This potential reveals new aspects of the Lambda (1405) and will be useful for reliable predictions of kaonic nuclei.
        Speaker: Mr Kenta Miyahara (Kyoto university)
        Slides
      • 16:20
        Status of the kaon-antikaon interaction studies 20m
        The strength of the kaon-antikaon interaction is crucial in the discussion on the nature of the scalar resonances a0(980) and f0(980), in particular for their interpretation as a K+K- molecules. So far, one of the few possibilities to study this interaction was the kaon pair production in multi-particle exit channels, e.g. like pp->ppK+K−. In this talk we present results of the K+K− interaction studies performed based on near threshold data gathered in proton-proton collisions at the Cooler Synchrotron COSY. We discuss also feasibility study of the $K+K-$ scattering length measurements at e+e− colliders.
        Speaker: Mr Michal Silarski (Jagiellonian University)
        Slides
      • 16:40
        Onset of Eta-meson binding in the He isotopes 20m
        The onset of Eta(548) binding in nuclei is explored in stochastic variational method (SVM) few-body calculations within a pionless effective field theory (EFT) approach at leading order, using regulated NN and NNN contact terms and a regulated energy-dependent Eta-N contact term derived from coupled-channel models of the N*(1535) nucleon resonance. A self consistency procedure is applied to deal with the energy dependence of the Eta-N subthreshold input, resulting in a weak dependence of the calculated Eta-nuclear binding energies on the EFT regulator. It is found [1] that the onset of binding Eta-3He requires a minimal value of the real part of the Eta-N scattering length close to 1 fm, yielding then a few MeV Eta binding in Eta-4He. The onset of binding Eta-4He requires a lower value which, however, exceeds 0.7 fm. Similar conclusions hold when the nuclear core dynamics is generated by using semi-realistic NN interactions [2]. [1] N. Barnea, B. Bazak, E. Friedman, A. Gal, arXiv:1703.02861. [2] N. Barnea, B. Bazak, E. Friedman, A. Gal, in preparation.
        Speaker: Prof. Avraham Gal (Hebrew University, Jerusalem, Israel)
        Slides
      • 17:00
        Precision spectroscopy of pionic 121, 116Sn atoms at RI Beam Factory 20m
        We report the precision spectroscopy of the pionic 121, 116Sn atom using the 122, 117Sn(d, 3He) reaction near the charged pion emission threshold.   An established approach for quantitative evaluation of the chiral symmetry breaking in finite density is study of pion-nucleus interaction through the experimental measurement of pionic atoms. So far the 1s pionic states in 205Pb and 115, 119, 123Sn have been discovered at GSI. The deduced chiral order parameter was compared with that of the vacuum, which was deduced from the pionic hydrogen, and partial chiral restoration was suggested. However, the evaluation still had large systematic and statistical errors.  For the further study of the symmetry breaking in medium, we measured the excitation energy of the 122, 117Sn(d, 3He) reaction at RIKEN, RI Beam Factory. The experiments were performed in 2010, as a pilot experiment, and 2014, for the precision measurement. In these experiments, we observed the distinct structures corresponding to the pionic bound states in 1s, 2p and other shallower states. At the pilot experiment, we succeed in measurement of the angular dependence of the pionic atom production reaction for the first time. In 2014, we improved the missing mass resolution and succeed in the precise determination of the binding energy of 1s and 2p pionic states simultaneously, which contribute to reduce the systematic errors dramatically. In the report, we will give the current status of the analysis.
        Speaker: Dr Takahiro Nishi (RIKEN Nishina center)
      • 17:20
        Search for the eta-mesic helium in proton-deuteron and deuteron-deuteron reactions 20m
        The existence of eta-mesic nuclei in which the eta meson is bound in a nucleus by means of the strong interaction was postulated already in 1986 but it has not been yet confirmed experimentally. The discovery of this new kind of an exotic nuclear matter would be very important as it might allow for a better understanding of the h meson structure and its interaction with nucleons. The search for eta-mesic helium is carried out with high statistics and high acceptance with the WASA detector, installed at the COSY accelerator in the Research Center Juelich. The search is conducted via the measurement of the excitation function for selected decay channels of the 4He-h and 3He-h systems. The talk will include description of the experimental method used at WASA and the status of the data analysis.
        Speaker: Dr Magdalena Skurzok (Jagiellonian University)
        Slides
      • 17:40
        Electromagnetic transition form factors of baryons in the space-like momentum region 20m
        A calculation of the electromagentic transition form factors between ground-state octet and decuplet baryons as well as the octet-only $\Sigma^0$ to $\Lambda$ transition is presented in the combined framework of of Dyson-Schwinger equations and covariant Bethe-Salpeter equations. Emphasis is put in the similarities among the different transitions as well as in the differences induced by $SU(3)$ flavour symmetry breaking.
        Speaker: Prof. Reinhard Alkofer (University Graz)
    • 18:00 19:00
      Poster Aula

      Aula

      Vienna

      Austrian Academy of Sciences Theatersaal Sonnenfelsgasse 19 1010 Vienna, Austria
      • 18:00
        A compact scitillating fibre detector addon for ASACUSAs hodoscope 1h
        The ASACUSA collaboration at CERNs Antiproton Decelerator aims to measure the ground-state hyperfine splitting of antihydrogen using a spec- troscopy method as a means to test CPT symmetry. The Rabi-type setup consists of an antiproton accumulator, a positron source, and a mixing trap functioning as antihydrogen source and a spectroscopy apparatus made out of a microwave cavity and a superconduction sextupole magnet, terminating in a tracking detector [1]. In previous beamtimes, this detector was made up out of a central BGO crystal and two layers of scintillating bars parallel to the beam direction [2][3]. This setup allowed measurements of the point of annihilation and the energy deposited as well as the angle of escaping π-mesons. Moreover, as the bars are read out on both sides a coarse position resolution in beam direction was also achieveable using timing information. For 2017s beamtime the detector was modified to allow a more precise spatial resolution in the beam direction by incorporating two additional layers of scintillating fibers perpendicular to the existing scintillating bars. The additional layers provide a spatial resolution in the order of millimeter which allows for an efficient discrimination of cosmic background as well as advanced tracking of the products of annihilation reactions. This contri- bution covers the design and construction of this upgrade to ASACUSAs detector as well as the results of preliminary performance studies. [1] E. Widmann et al. “Measurement of the hyperfine structure of antihy- drogen in a beam”. In: (Jan. 2013). arXiv: 1301.4670v1. url: http: //arxiv.org/abs/1301.4670v1 (cit. on p. 1). [2] Y. Nagata et al. “The development of the antihydrogen beam detec- tor and the detection of the antihydrogen atoms for in-flight hyperfine spectroscopy”. In: Journal of Physics: Conference Series 635.2 (2015), p. 022061. url: http://stacks.iop.org/1742-6596/635/i=2/a= 022061 (cit. on p. 1). [3] C. Sauerzopf et al. “Annihilation detector for an in-beam spectroscopy apparatus to measure the ground state hyperfine splitting of antihy- drogen”. In: (June 2016). url: http://www.sciencedirect.com/ science/article/pii/S0168900216305630 (cit. on p. 1).
        Speaker: Ms Bernadette Kolbinger (Stefan Meyer Institute, Austrian Academy of Sciences)
      • 18:00
        A CsI detector system at low temperatures for an antimatter gravity measurement 1h
        The AEgIS Collaboration at CERN will perform the world’s first direct measurement of the Earth´s gravitational acceleration on antimatter, by sending an antihydrogen beam through a classical deflectometer. I will present a detector for a first measurement of the gravitational effects on an antimatter system. The detector consists of pure Caesium Iodide crystals and commercially available Silicon Photomultipliers to measure the light produced in the corresponding annihilation processes. The CsI crystals decay times and spectra were characterized using a Na²² source at room and at low temperatures. Furthermore the behaviour of the SiPMs at low temperatures was examined. A measurement at the GRACE line using antiprotons is planned for August.
        Speaker: Mr Sebastian Kalista (Stefan Meyer Institute)
      • 18:00
        A New Silicon Drift Detector System for the Kaonic Deuterium Measurement 1h
        The measurement of kaonic deuterium atoms provides an ideal setting to gather information about the strong interaction of particles with strangeness at low energy. In the E57 experiment at J-PARC and with SIDDHARTA-2 at DAΦNE the shift and width of the K-d 1s state will be determined by using newly developed Silicon Drift Detectors (SDDs) as a high precision x-ray detector. For both experimental setups the detector consists of 48 SDD arrays in different arrangements, which will measure the emitted X-rays of the kaons when cascading from an excited state to the ground state. The E57 set-up uses amplifier boards, developed at the SMI, including a digital logic part to provide a single gate output for 8 SDD channels. Furthermore, the cable length between SDDs and amplifier boards has to be longer than one metre, which made the development of a line-driver unit necessary. First test measurements, simulating the final E57 set-up, with a Fe-55 source were performed for SDD temperatures below 170K. The achieved results, fulfilling all the necessary requirements, will be shown.
        Speaker: Carina Trippl (Stefan-Meyer-Institute)
      • 18:00
        Alkali Earth Ion Spectroscopy in Preparation of a Weinberg Angle Measurement 1h
        Through precision spectroscopy on Ba+ ions we determine precisely the 6s2S1/2 - 6p2P1/2, 6p2P1/2 - 5d2D3/2, 6s2S1/2 - 5d2D3/2 transition frequencies. In these experiments we employ laser-cooled single trapped ions. The optical frequencies are controlled by a frequency comb and I2 line locked laser system. We have achieved more than 2 orders of magnitude improved values, i.e. we have reached 10−11 relative accuracy. In a further measurement we have determined precisely the lifetime of the lifetime of the 5d2D5/2 state. Our experiment is aimed at precisely testing the available atomic calculations and in particular atomic wave functions the knowledge of which is needed for interpreting a precise measurement of atomic parity violation in heavy alkaline earth atoms through light shifts in the narrow optical 6s2S1/2-5d2D3/2 single photon transition. The weak mixing angle can be determined precisely from the weak interaction contributions between primarily the nuclear neutrons and the atomic valence electron to the atomic binding.
        Speaker: Mrs Niveya Valappol (University of Groningen)
      • 18:00
        Antihyrogen production at RHIC and LHC energies 1h
        Colliding beams of heavy ions at energies per nucleon in the range 10^2 - 10^4 GeV, corresponding to experiments RHIC at Brookhaven, and LHC at CERN, suggested that intense electromagnetic fields of these ions can produce relatively large fluxes of electron and heavy lepton pairs. The bound-free pair production (BFPP) is one of the processes that restrict the luminosity of the ion beams. In this process, the charge of the ion decreases and it is depleted out of the beam. For this reason, the calculation of the exact bound-free electron-positron pair production cross section is important for deciding the stability of the beam. Another important application of this calculation is for producing anti-hydrogen. Anti-hydrogen is the simplest bound state of antimatter and may be produced with the collision of anti-protons with ions. They were first produced and observed at CERN Low Energy Antiproton Ring (LEAR) in 1995. In this process (anti(p)+Z -> anti(H)+e(-)+Z), Xenon(Z=54) has been used. This process was first proposed by Munger et al. and they studied for the calculation of antihydrogen production cross section by the equivalent photon approximation (EPA). The cross section calculation of antihydrogen production is important, because as being BFPP, antihydrogen production mechanism also leads to a beam loss. In this work, we have calculated the BFPP and relativistic antihydrogen production with Monte Carlo integration techniques by computing the Feynman diagrams. The calculation shows that for large energies and charges, the antihydogen production cross section is quite large.
        Speaker: Prof. Mehmet Cem Guclu (Istanbul Technical University)
      • 18:00
        Cryogenic detector for mass spectrometric identification of neutral molecules towards atomic and molecular collision experiments 1h
        To explore the quantum collision dynamics of the stored molecular ions by the merging experiments with a beam of the neutral atoms, we are developing a new technique of mass spectroscopy for the neutral molecular fragments from the collisions using an array of superconducting transition-edge-sensor (TES) microcalorimeters at a brand-new cryogenic electrostatic ion storage ring in RIKEN (Wako, Japan). In the cosmic space, more than 100 kinds of various molecules exist despite low temperature and low density which is disadvantageous environment to the molecule formations. It remains still unknown how to be generated even for the simple molecules. We have recently developed a cryogenic low-temperature ion storage ring to reproduce such chemical reactions at a temperature of outer space. A molecular ion beam with a vibration-rotation energy (temperature) of ~4 Kelvin is stored in this storage ring; and we conduct experiments by an interflow collision with neutral molecular beam having the same direction and velocity as the stored ion beam, where low-energy collisions at the center-of-mass system are realized. It is important to identify the products by measuring those molecule masses after the collision to study the reaction mechanism. In the case of neutral fragments, however, it is difficult to apply the ordinary mass spectrometry without ionization for the neutral fragments. In our storage ring, the neutral products after the collision have almost the same velocity as initial ions / neutral molecules; thus mass identification can be realized by a measurement of the translational energy. However, the energy resolution of Micro Channel Plate (MCP) detector commonly utilized so far is not enough to identify the mass of molecular fragments. We aim a direct detection of neutral molecules and molecular fragments (less than 15 keV) generated after the chemical reactions reproduced using an array of TES microcalorimeters developed by NIST. By a measurement of the kinetic energy, we perform the mass spectrometric identification of those neutral fragments and aim comprehensive understanding of the chemical reactions from the initial to final stages. TES is operated at the superconducting critical temperature of less than 100 mK; thus we usually install radiation shields in front of the TES sensors to avoid infrared background from heat radiation which deteriorates the energy resolution. Unlike x-rays, the low energy molecules (~10 keV) easily stop at the radiation shields even for 100-nm-thick aluminum sheet; thus we need to remove the radiation shield window. One of key issue towards this TES application is how to operate TES system against the radiation background although our storage ring is at 4 K. We just started the study at RIKEN from this spring. In this presentation we will give an overview of this project and the recent progress.
        Speaker: Dr Shinji Okada (RIKEN)
        Slides
      • 18:00
        Event reconstruction and simulation in PandaRoot for the PANDA experiment 1h
        The PANDA experiment, currently under construction at the Facility for Antiproton and Ion Research (FAIR) in Darmstadt, Germany, addresses fundamental questions in hadron and nuclear physics via interactions of antiprotons with a proton or nuclei, e.g. light and charm exotics, multi-strange baryons and hadrons in nuclei. It will be installed at the High Energy Storage Ring (HESR), which will provide an antiproton beam with a momentum range of 1.5 – 15 GeV/c and enables an high average interaction rate on the fixed target of 2 × 10 7 events/s. The PANDA experiment adopts a triggerless, continuous data acquisition. The data rate without any suppression will be in the order of 200 GB/s. With an online software-based data selection system a data reduction of a factor 100 – 1000 has to be achieved. This demands a highly advanced online analysis due to the high interaction rate which has to deal also with overlapping event data. Scalability and parallelization of the reconstruction algorithms are therefore a particular focus in the development process. A simulation framework called PandaRoot is used to develop and evaluate different reconstruction algorithms for event building, tracking and particle identification as well as further optimization of the detector performance. In a novel approach PandaRoot is able to run time-based simulations which allows to simulate the continuous data stream and the mixing of events in addition to the standard event-based simulation. It utilizes the common software framework for the future FAIR experiments, FairRoot, which is based on ROOT and Virtual MonteCarlo with Geant3 and Geant4. This contribution will give an overview about PandaRoot, the requirements on the event reconstruction algorithms and present the status of a reconstruction and tracking algorithm currently under development.
        Speaker: Dominik Steinschaden (Stefan Meyer Institute)
      • 18:00
        Feasibility of quantum coherence with ultracold neutrons 1h
        Two new experimental capabilities developed at LANL, the unprecedented ultracold neutron (UCN) source intensity and a highly accurate imaging UCN spectroscopy [1, 2], open door to precision UCN physics including quantum physics. UCNs provide one of the most sensitive probes for quantum physics and fluctuations since neutrons carry no electric charge and have already shown energy sensitivity approaching 10-14 eV or 0.01 peV at micron length scales, a regime inaccessible by using charged particles (limited by Coulomb interaction) or even ultracold atoms (due to electric dipole or Van der Waals interaction). By scattering UCNs off nanostructures (the wavelength of a typical UCN is around 100 nm), we can look for signatures of quantum coherence such as angular-dependent interference fringes and intensity correlations between two detectors, similar to the Hanbury-Brown & Twiss effect for photons. Another goal of the project is to investigate the feasibility of a source of coherent UCNs. Some preliminary theoretical results will also be given. References: [1] Z. Wang, M. A. Hoffbauer, C. L. Morris, N. B. Callahan, et al, ‘A Multilayer Surface Detector for Ultracold Neutrons.’ Nucl. Instrum. Meth Phys. Res. A 798, (2015) 30-35. [2] W. Wei, L. J. Broussard, et al., ‘Position-sensitive detection of ultracold neutrons with an imaging camera and its implications to spectroscopy.’ Nucl. Instrum. Meth Phys. Res. A 830, (2016) 36-43.
        Speaker: Dr Zhehui Wang (Los Alamos National Laboratory)
      • 18:00
        Hyperfine splitting in the ground state of muonic hydrogen: an overview of the FAMU project 1h
        A brief overview of the recent progress in the research program of the FAMU collaboration is presented, with particular emphasize on the development of a mathematical model of the multi-pass optical cavity, needed for the optimization of the experimental set-up for the measurement of the hyperfine splitting in the ground state of the muonic hydrogen atom by laser spectroscopy methods. The specificity of the model is related to the fact that a pulsed laser and a pulsed muon source will be used in the experiment that makes the time distribution of the laser energy in the cavity as important as the spatial distribution. The preliminary analysis shows that the optimized parameters of a cavity with realistic characteristics will guarantee the required efficiency of the experimental method.
        Speaker: Prof. Dimitar Bakalov (Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences)
      • 18:00
        Lambda - Proton Correlation in Pion-Induced Reactions at 1.7 GeV/c* 1h
        World data for elastic $\Lambda-p$ scattering over a wide range of relative momenta are quite scarce and only available for small beam momenta with an overall statistics of less then 200. The situation for $\pi^-$-induced reactions is even more limited. In order to improve the theoretical description, new constraints are necessary to parametrise the cross sections. In this context a dedicated $\pi^-$ + A (A = C, W) experimental campaign was performed at $p_\pi = 1.7$ $GeV/c$ with the HADES detector (SIS18/GSI). The $\Lambda$ yield has been studied and further on the $\Lambda - p$ correlation is investigated. For the reconstruction of the $\Lambda$ in the inclusive spectra the charged decay channel ($\Lambda \rightarrow p \pi^-$, BR = 63.9\%) is examined. After topological cuts, an integrated yield of ~11k $\Lambda$ has been extracted with a purity of 93\% ($\pi^- + W$). The data is corrected for limited efficiency and acceptance and extrapolated to uncovered phase space by using a Boltzmann distribution. For the study of the $\Lambda - p$ correlation it is necessary to know all kinematic variables of the $\Lambda$ before the scattering, which are reconstructed with the incoming beam and the outgoing $K^0$. Thus, events with a matching charge pattern ($\Lambda \rightarrow \pi^- p, K^0 \rightarrow \pi^+ \pi^-, p$) are selected. Based on a likelihood-method the particle species is determined considering the specific energy-loss in the MDCs and velocity $\beta$. Since the selected pattern contains two $\pi^-$ and p in the final state, an event hypothesis is applied to assign their corresponding mother particle. The best combination is selected by a simultaneous matching of the invariant mass to the nominal value within the detector resolution. This procedure leads to an extraction of $\sim$6k events in the $\pi^- + W$ system. \newline Shown on the poster is the extracted $\Lambda$ yield, aside with the preliminary $\Lambda - p$ correlation. * supported by the DFG cluster of excellence "Origin and Structure of the Universe" and BMBF 05P15WOFCA
        Speaker: Mr Steffen Maurus (TU München)
      • 18:00
        Machine learning methods in the analysis of low-mass dielectrons in ALICE 1h
        Results from non-perturbative QCD indicate that chiral symmetry may be restored in the hot and dense matter produced in relativistic heavy ion collisions. This restoration would affect the vector meson mass spectrum and could be examined with the ALICE detector at the LHC. One of the most promising probes to study these effects are dileptons (mu+mu- and e+e-) from rho meson decays since they reach the detector without significant final state interactions. In order to precisely measure the low-mass dielectron spectrum a high purity sample of e+e- pairs will be required. Whilst traditional cut based methods can provide high purity samples, they suffer from low efficiency. Multivariate particle identification could in future be used to alleviate this drawback. The main background in the analysis of dielectrons are combinatoric e+e- pairs (S/B ~ 10-3 for 0.3 < Mee < 1 GeV/c2). This background contribution can be suppressed by rejecting e+ and e- tracks that originate from photon conversion processes. Numerous observables allow to discriminate background from signal dielectrons which motivates a multivariate approach in the classification of e+e- pairs. The employed machine learning methods and performance based on Monte-Carlo data will be presented as well as their application in the analysis of LHC Run 2 data.
        Speakers: Mr Aaron Capon (SMI) , Sebastian Lehner (Stefan-Meyer Institute)
      • 18:00
        Physics program of a high-luminosity low-energy collider 1h
        We present the physics program of a high-luminosity low-energy $e^+e^-$ collider, which project is developed in BINP (Novosibirsk). The collider center-of-mass energy varies from 210 MeV up to 960 MeV. The physics program includes observaion and study of the $\mu^+mu^-$ bound state, dimuonium, measurement of effects of the final state interaction in the reactions $e^+e^-\to \mu^+mu^-$ and $e^+e^-\to \pi^+pi^-$ near thresholds, precise measurement of hadronic cross sections ($e^+e^-\to \pi^+pi^-$, $\pi^+pi^-\pi0$, $\pi^0\gamma$ etc.), study of rare processes, in particular, observation of direct production of the pseudoscalar mesons $\eta$ and $\eta^\prime$.
        Speaker: Konstantin Beloborodov (Budker INP)
      • 18:00
        Positron production in collision of heavy nuclei 1h
        We consider the electromagnetic production of positron in collision of slow heavy nuclei, with the simultaneously produced electron captured by one of the nuclei. The cross-section of the discussed process exceeds essentially the cross-section of e^+ e^- production.
        Speaker: Dr I.B. Khriplovich (Sanct-Petersburg University)
      • 18:00
        QCD analysis of xF3(x,Q2) structure function up to NNLO 1h
        We present the results of non-singlet QCD analysis of xF3(x,Q2) structure function in NLO and NNLO which are performed based on charged current (CC) neutrino-nucleon deep inelastic scattering (DIS). In this analysis we extract the valence quark parton distributions xuv(x,Q2) and xdv(x,Q2) in a wide range of x and Q2, and determine their parameterization in two different scenarios with the correlated errors using xFitter package. We determine the strong coupling of Undefined control sequence alphs up to NNLO and perform a comparison with other determinations of Undefined control sequence alphs in deeply inelastic scattering. Our results for valence quark distributions and the strong coupling constant at NLO and NNLO are compatible with the available theoretical models.
        Speaker: Mrs azam Ghaffari-tooran (Semnan University of Iran)
      • 18:00
        Regeneration of $K^0_{S}$ mesons 1h
        It is shown that in the previous calculations of $K^0_{S}$ regeneration the noncoupled equations of motion have been considered instead of coupled one. We present the calculations based on the exact solution of coupled equations of motion and perturbation theory. The results differ radically from the previous ones.
        Speaker: Dr valeriy nazaruk (Institute for Nuclear Research of RAS,)
      • 18:00
        Resonance states in a cold collision between an antihydrogen atom and a hydrogen atom/ion 1h
        An antihydrogen atom for a precise spectroscopy and a free-fall experiment is prepared in a high vacuum (~1 pPa) in a low temperature (down to a few Kelvin) and may annihilate with impurity particles: hydrogen atoms/ions, electrons and other gas atoms. Precise data of collision processes are required in the forthcoming experiments. The collision process of the antihydrogen atom and a hydrogen atom has been a fundamental and challenging problem for both theoretical and experimental studies. The reaction process is completely different from that of two hydrogen atoms. In the former collision, rearrangement of four particles occurs; namely, a protonium (Pn) and positronium (Ps) formation channel opens. The Pn would be in highly excited states due to energy matching between the initial and final states. The Pn deexcites to lower energetic states giving excess energy to Ps. The motion of the nuclei strongly affects the lepton motions. However, many works have adopted adiabatic methods in which the motions of nuclei and light particles are separately calculated in this collision process. In this work, we perform a non-adiabatic calculation of the resonance states near the cold collision energy between the antihydrogen atom and the hydrogen atom/ion. Oscillation Gaussian basis sets are introduced to reproduce the highly excited Pn wavefunctions up to n=30 with an accuracy of 6-digit. Near the cold collision threshold, resonance energies and widths are obtained by a complex rotation method. To reveal the resonance mechanism, proton mass dependence of resonance parameters is examined and compared with adiabatic calculations. The resonance states near the collision energy show a deviation from the adiabatic vibrational states and the widths are independent of the initial channel. It indicates that the resonance states couple with the rearrangement channels which breaks the adiabatic picture. The resonance widths are found to be broader than that of Boltzmann distribution of the experimental condition. Thus, the resonance phenomena are expected to be a good indication of temperature of an ultra cold atomic gas and to be utilized to purge the impurity particles by changing the temperature.
        Speaker: Mr Takuma Yamashita (Tohoku University)
      • 18:00
        Search for a violation of the Pauli Exclusion Principle with electrons at LNGS 1h
        The Pauli Exclusion Principle (PEP) is the foundation for our understanding of physics where systems of fermions are concerned. Therefore, it is important to make precision tests of the PEP. In a pioneering experiment, Ramberg and Snow supplied an electric current to a Cu target, and searched for PEP violating atomic transitions of the “fresh" electrons from the current. The non-existence of the anomalous X-rays from such transitions then set the upper limit for a PEP violation. The VIP2 (VIolation of Pauli Exclusion Principle) experiment improves this method. The experiment and the preliminary results from the first data taking period in the underground laboratory of Gran Sasso (LNGS) will be presented.
        Speaker: Mr Andreas Pichler (Stefan-Meyer Institut für subatomare Physik)
      • 18:00
        Status Update of NoMoS 1h
        We present a new method of spectroscopy, utilizing a drift effect to disperse charged particles in a uniformly curved magnetic field. The curved field results in a drift of the charged particles perpendicular to the radius of the curvature and to the magnetic field, which is proportional to the particle’s momentum. A spatial-resolving detector will determine the momentum spectra. The first realization, called NoMoS (Neutron decay prOducts MOmentum Spectrometer), will measure correlation coefficients in free neutron beta decay to test the Standard Model of particle physics and to search for physics beyond. Currently, the focus is on the design and the construction of the magnet system.
        Speaker: Mr Daniel Moser (Technische Universität Wien)
    • 19:00 19:30
      Music, Snacks, and Drinks

      Aseo Friesacher Trio Jazz ensemble

    • 09:00 09:30
      Mesons in the medium - what have we learned?* 30m
      The in-medium modifications of hadron properties have been identified as one of the key problems in understanding the non-perturbative sector of QCD. Several theoretical papers discuss the possibility of a partial restoration of chiral symmetry in a strongly interacting environment. However, is it possible to find experimental evidence for partial symmetry restoration by studying the in-medium behaviour of mesons, in particular the meson-nucleus interaction? Is this interaction sufficiently strong to allow even the formation of mesic states only bound by the strong interaction? The answers can be given by studying the meson-nucleus interaction. In this presentation the experimental approaches to deduce the meson-nucleus potential and experimental results from CBELSA/TAPS will be discussed. Data taken on a C and Nb target have been analyzed to deduce the real and imaginary part of the η'- and ω-nucleus potential. The data for both mesons are consistent with a weakly attractive potential. The formation and population of ω-nucleus and η'-nucleus bound states will be discussed. In case of the ω meson the in-medium width is found to be larger than the potential depth which hampers a successful identification of ω-mesic states. The relatively small in-medium width of the η' meson encourages ongoing experiments to search for η'-nucleus bound states. *Funded by DFG(SFB/TR-16)
      Speaker: Dr Mariana Nanova (II. Phys. Inst., University of Giessen, Germany)
      Slides
    • 09:30 10:00
      Lattice QCD studies of Dibarion candidates 30m
      In recent years, there is a renewed interest in the dibaryons due to exclusive measurements in hadron reactions as well as the direct measurement in relativistic heavy-ion collisions. In this talk, we present the result of the first principle calculation using lattice QCD. Particularly we focus on the study for dibaryon candidates involving with the decuplet baryon: (i) the Delta-Delta system and Omega-N system with the heavy pion mass, and (ii) the Omega-Omega system with the physical pion mass. Our result of the Delta-Delta interaction is that in the 7S3 channel, only an strongly attractive interaction (no repulsive core) appears, which leads to a bound state of two-Delta's, the so-called “ABC effect”, observed as a resonance of two-nucleons in experiment by CELSIUS/WASA Collaboration. The result of the Omega-N interaction in the 5S2 channel also shows the strong attractive interaction and the deep bound state, which is expected to be probed in the heavy ion collision, and the result of the Omega-Omega interaction in the 1S0 channel at physical point shows a shallow bound state, which is similar to deuteron.
      Speaker: Dr Shinya GONGYO (RIKEN)
      Slides
    • 10:00 10:30
      Review of lattice results concerning lo w energy particle physics 30m
      Speaker: Dr Urs Wenger (University of Bern)
      Slides
    • 10:30 11:00
      Coffee break 30m
    • 11:00 11:30
      Observation of pi-K+ and pi+K- atoms 30m
      Experiment DIRAC at CERN PS detects 349+-62 pairs from K+pi- and pi+K- atoms and make observation of exotic atoms consist of pion and kaons. It allows to measure a difference of S-wave pion-kaon scattering length with isospin 1/2 and 3/2: |a1/2 - a3/2|. Values of pion-kaon scattering lengths are predicted in a frame of ChPT and LQCD. Therefore investigation of pi-K+ and pi+K- atoms gives possibility to check this predictions for simplest hadron-hadron system with s-quark.
      Speaker: Dr Valeriy Yazkov (Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University)
      Slides
    • 11:30 12:00
      Results and prospects for low-energy QCD processes from COMPASS 30m
      The COMPASS collaboration investigates since more than 15 years a large variety of high-energy QCD processes at the CERN Super Proton Synchrotron. While the intense 160 GeV muon beam is used for deep-inelastic scattering and the study of nucleon structure functions, a second important part of the program is dedicated to the scattering of 190 GeV pions on a liquid hydrogen and nuclear targets. The latter includes the study of diffractive reactions, used for light-meson spectroscopy, and pion-photon induced reactions, which give access to several quantities of interest for low-energy QCD. The respective results on the pion polarisability, as well as the status for a high-precision determination of the chiral anomaly and reactions involving the pion scattering lengths are discussed.
      Speaker: Dr Jan Friedrich (TU München)
      Slides
    • 12:00 12:30
      The current status of fundamental physic s at J-PARC including hadron physics,and future plans with upgrades 30m
      Speaker: Naohito Saito (KEK)
      Slides
    • 12:30 14:00
      Lunch break 1h 30m
    • 14:00 18:00
      Parallel P5 & P6
      • 14:00
        Direct detection of antiproton annihilations with the Timepix3 using GRACE ­ a facility for extraction of very low energy antiprotons at the CERN AD 20m
        One of the key aspects in antimatter research is the detection and tagging of antiprotons and antihydrogen, which is usually achieved via tracking of the annihilation products while the annihilation occurs somewhere else, e.g. on the walls of the traps. We hereby report on a novel approach of a so-called direct detection of antiprotons, in which they annihilate within the detector volume and which has the potential of sensibly improving the resolution on the position determination. The R&D effort was made within the AEgIS experiment at CERN that aims to study antimatter gravity, i.e. to directly measure the free fall of antihydrogen with a precision of the order of few percent. The design of the experiment requires detection of antihydrogen annihilations with a resolution on the position of the order of 10 um. The development of a position sensitive detector that would measure the vertical shift of the antihydrogen atoms influenced by the Earth\u2019s gravity included evaluation of different detector technologies for direct antiproton annihilation. The first tests and measurements were performed in 2012, using monolithic active pixel and 3D sensors within the main AEgIS apparatus. The promising results lead to the development and construction of a dedicated facility for detector studies, GRACE, which is operational since 2015. This beam line makes use of the secondary branch of the existing antiproton beam line at the Antiproton Decelerator, which it shares with the AEgIS experiment . GRACE exploits simple beam optics and an electrostatic deflector to provide antiprotons with very low energy (1-8 keV). Over the last two years GRACE has been employed to study the performance of the Timepix3 as a direct annihilation detector. The Timepix3 is an ASIC developed within the Medipix3 collaboration at CERN, characterized by an extremely high spatial resolution and accurate TOA (time-of-arrival) and TOT (time-over-threshold) information. For our application, the Timepix3 chip was coupled to a particularly thick (675 um) silicon sensor, allowing a much-improved tracking length. These characteristics make it ideal to tag the typical signature of antiproton annihilation, where several charged products depart from the annihilation point, with typical energies of hundreds of MeV, creating a signature star-shaped event. Some of the results on the performance of GRACE as well as a detailed study of the Timepix3 capabilities as an annihilation detector will be presented.
        Speaker: Angela Gligorova (Stefan Meyer Institute, Austrian Academy of Sciences)
      • 14:20
        Cosmological properties of gravitational torsion, torsion-fermion interactions and their observation in terrestrial laboratories 20m
        Torsion is a geometrical characteristic of a curved spacetime, which is additional to a metric tensor. In the standard form of the Eistein-Cartan gravitational theory it is shown that the contribution of torsion to the Einstein equations can be interpreted in terms of the torsion energy-momentum tensor. A requirement of its local conservation in a curved spacetime with an arbitrary metric or an arbitrary gravitational field demands a proportionality of the torsion energy-momentum tensor to a metrictensor, a covariant derivative of which vanishes because of the metricity condition. This fulfill a requirement of local conservation. The coefficient of proportionality can be identified with the cosmological constant. This allows to claim that torsion can serve as a geometrical origin i) for vacuum energy density, given by cosmological constant or dark energy density in the Universe, and ii) for Big Bang because of its negative pressure. This is a model-independent result, which is also valid in the Poincaré gauge gravitational theory by Kibble (T. W. B. Kibble, J. of Math. Phys., 2, 212 (1961)). In terrestrial laboratories torsion can be probed through torsion-fermion low-energy interactions.
        Speakers: Prof. Andrei Ivanov (Atominstitut, TU Wien) , Markus Wellenzohn (FH Campus Wien, University of Applied Sciences)
      • 14:40
        Interaction of real and virtual $p\bar{p}$ pairs in $J/\psi$ decays 20m
        The $p\bar{p}$ invariant mass spectra of the processes $J/\psi\to p\bar{p}\pi^0$, $J/\psi\to p\bar{p}\eta$, $J/\psi\to p\bar{p}\omega$, $J/\psi\to p\bar{p}\rho$, and $J/\psi\to p\bar{p}\gamma$ close to the $p\bar{p}$ threshold are calculated by means of the $N\bar{N}$ optical potential. The simple potential model for $N\bar{N}$ interaction in the $^{1}S_{0}$ and $^{3}S_{1}$ states is proposed. The parameters of the model are obtained by fitting the cross sections of $N\bar{N}$ scattering together with the cross sections of $N\bar{N}$ production in $e^+e^-$ annihilation and the $p\bar{p}$ invariant mass spectra of the $J/\psi$ decays. Good agreement with the available experimental data is achieved. Using our potential and the Green's function approach we also describe the peak in the $\eta'\pi^{+}\pi^{-}$ invariant mass spectrum in the decay $J/\psi\to\gamma\eta'\pi^{+}\pi^{-}$ in the energy region near the $N\bar{N}$ threshold.
        Speaker: Mr Sergey Salnikov (Budker Institute of Nuclear Physics)
        Slides
      • 15:00
        Hypernuclear Production by Coherent Antiproton-Nucleus Annihilation Reactions 20m
        Coherent reactions, when the hypernucleus is produced in a fixed quantum state, are especially sensitive to the reaction mechanism and to the properties of the hyperon-nucleus interaction. Exclusive hypernuclear production reactions by antiproton annihilation on a nuclear target populating single-Lambda states plab = 1.5...20 GeV/c are discussed in a Glauber model approach [1,2]. Initial and final state interactions are considered. Available elastic antiproton-nucleus data are well described. The elementary production amplitude of the underlying proton-antiproton to hyperon-antihyperon process includes 𝑡-channel exchange by the pseudoscalar K, vector K*(860), and the yet to be confirmed scalar kappa(800) S=+/-1 mesons. The relativistic wave functions of the bound proton and Λ are calculated from the static Dirac equation with scalar and vector potentials describing properly the binding energy and r.m.s. nucleon radii of the initial nucleus and the phenomenological energy levels of the final hypernucleus. The inclusion of the kappa meson strongly influences the beam momentum dependence of the hypernucleus production cross sections in various quantum states [2]. This can be regarded as the first clear signal of the correlated pion-Kaon exchange in antiproton-nucleus collisions. [1] A. Larionov, H. Lenske, Nucl.Phys. A957 (2017) 450. [21] A. Larionov, H. Lenske, PLB (in print), arXiv:1703.02073
        Speaker: Prof. Horst Lenske (JLU Giesen)
        Slides
      • 15:20
        Tomography and gravitational radii for hadrons by three-dimensional structure functions 20m
        Tomography and gravitational radii for hadrons by three-dimensional structure functions S. Kumano, Qin-Tao Song, and O. V. Teryaev Hadron tomography can be investigated by three-dimensional structure functions such as generalized parton distributions (GPDs), transverse-momentum-dependent parton distribution (TMDs), and generalized distribution amplitudes (GDAs). The GPDs and GDAs contain information on spacelike and timelike transverse form factors of the energy-momentum tensor, so that they probe gravitational-interaction radii of hadrons [1]. Although charge radii of the nucleons are determined, mass radii have not been measured for any hadrons. Here, we extract the GDAs, which are s-t crossed quantities of the GPDs, from cross-section measurements of hadron-pair production process gamma+gamma^* to h+hbar [1]. The GDAs are expressed by a number of parameters and they are determined from pion-pair production data of KEKB. We discuss the dependence on parton-momentum fraction z in the GDAs and also time-like form factor of the energy-momentum tensor [1]. Our studies should be valuable for probing three-dimensional structure of hadrons, especially for applications to exotic hadron candidates which cannot be used as fixed targets for GPD and TMD measurements [2]. In addition, the results indicate the gravitational-interaction radius for the pion [1]. The GDA studies are also possible by the two-photon process into a hadron pair by ultra-peripheral collisions at LHC and RHIC. In future, there is a possibility to investigate the GPDs at J-PARC for nucleon tomography [3]. [1] S. Kumano, Qin-Tao Song, and O. V. Teryaev, KEK-TH-1959, J-PARC-TH-0086, to be submitted for publication. [2] S. Kumano and H. Kawamura, Phys.Rev. D89 (2014) 054007. [3] S. Kumano, M. Strikman, and K. Sudoh, Phys. Rev. D80 (2009) 074003; T. Sawada, Wen-Chen Chang, S. Kumano, Jen-Chieh Peng, S. Sawada, and K. Tanaka, Phys. Rev. D 93 (2016) 114034.
        Speaker: Prof. Shunzo Kumano (KEK/J-PARC)
        Slides
      • 15:40
        Coffee break 20m
      • 16:00
        Antikaon in the nuclear medium and the role of $K^-$ multinucleon interactions 20m
        We report on our very recent self-consistent calculations of $K^-$-nuclear quasi-bound states [1]. Relevant $K^-$ optical potentials were developed within several chiral meson-baryon coupled-channel interaction models [2-5]. The applied models yield quite different $K^-$ binding energies and widths [6]. Then, the $K^-$ multinucleon interactions were incorporated by a phenomenological optical potential introduced recently to achieve good fits to kaonic atom data [7]. Our calculations show that the effect of $K^-$ multinucleon interactions on $K^-$ widths in nuclei is decisive. The resulting widths are considerably larger than corresponding binding energies. Moreover, when the density dependence of the $K^-$ multinucleon interactions derived in the fits of kaonic atoms is extended to the nuclear interior, the only two models acceptable after imposing as additional constraint the single-nucleon fraction of $K^-$ absorption at rest do not yield any kaonic nuclear bound state in majority of considered nuclei. [1] J. Hrtankova, J. Mares, Phys. Lett. B in print, arXiv:1703.01788v2 [nucl-th]. [2] A. Cieply, J. Smejkal, Nucl. Phys. A 881 (2012) 115. [3] Y. Ikeda, T. Hyodo, W. Weise, Nucl. Phys. A 881 (2012) 98. [4] Z. H. Guo, J. A. Oller, Phys. Rev. C 87 (2013) 035202. [5] M. Mai, U.-G. Meissner, Nucl. Phys. A 900 (2013) 51. [6] J. Hrtankova, J. Mares, subm. Phys. Rev. C, arXiv:1704.07205 [nucl-th]. [7] E. Friedman, A. Gal, Nucl. Phys. A 959 (2017) 66.
        Speaker: Prof. Jiri Mares (Nuclear Physics Institute)
        Slides
      • 16:20
        LOW-ENERGY ELECTRON-POSITRON COLLIDER TO SEARCH AND STUDY (mu+mu-) BOUND STATE 20m
        The paper discusses a low energy е+е- collider for production of the (mumu-) bound system (dimuonium) which has not yet been observed. We use large crossing angle for e+e- beams intersection; therefore, dimuonium carries non-zero momentum and its decay point is shifted from the beam collision area providing effective suppression of the elastic e+e- scattering background. Discussion of the experiment constraints defines subsequent collider specifications. We show preliminary layout of the accelerator and obtained main parameters. Chosen beam energy range and high luminosity also allow to study pi+pi- and eta-mesons.
        Speakers: Dr Aleksander Milstein (BINP) , Dr Anton Bogomyagkov (BINP) , Eugene Levichev (Budker INP) , Dr Vladimir Druzhinin (BINP)
        Slides
      • 16:40
        Construction and Assembly of the first Barrel Slice for the Electromagnetic Calorimeter of the PANDA experiment 20m
        The first major assembly stage of the barrel part of the electromagnetic calorimeter of the PANDA experiment at the future FAIR facility by assembling one single barrel slice segment will be presented. The calorimeter is composed of two endcaps and a barrel covering the major part of the solid angle consisting of more than 11.300 tapered PbWO4 crystals. Each scintillator module is readout via two large area avalanche photo diodes connected to custom made ASIC-preamplifier. The construction of the first segment comprises a full length slice beam holding in total 18 module blocks. Each block consists of a matrix of 4x10 crystals. The assembly procedure of single detector modules, module blocks and the overall slice segment, respectively will be discussed. Test results of single components and fully assembled detector modules will be discussed and compared with earlier prototype in-beam and lab tests. Supported by BMBF, GSI and HIC for FAIR.
        Speaker: Dr Markus Moritz (JLU Giessen)
        Slides
      • 17:00
        Dynamically generated hadronic states in the $\bar{K}N$ and $\eta N$ coupled-channels interactions 20m
        The modern approach to meson-baryon interactions at low energies is based on coupled-channels techniques with inter-channels couplings derived from an effective chiral Lagrangian. These interactions lead to emergence of dynamically generated resonances that are assigned to experimentally observed hadronic states with the $\Lambda(1405)$ and $N^{*}(1535)$ being the most prominent ones in the strangeness sectors S=-1 and S=0, respectivelly. The resonances are related to the poles of the transition matrix with the pole positions identified as solutions of the equation that sets to zero the determinant of the inverse of the T-matrix. In our study we use models presented in Refs. [1] and [2] to analyze the conditions for an emergence of such poles in the $\bar{K}N$ and $\eta N$ s-wave amplitudes. Additional insights are obtained by investigating movement of the poles to the zero coupling limit in which the inter-channels couplings are switched off. In particular, different concepts of forming the $\Lambda(1405)$ resonance were revealed and constraints related to the appearance of such poles were discussed in [3] where a comparative analysis of various approaches to the $\bar{K}N$ interactions was presented as well. Our analysis also indicates a possible existence of a subthreshold isovector $\bar{K}N$ resonance. [1] A. Cieply and J. Smejkal, Nucl. Phys. A881 (2012) 115. [2] A. Cieply and J. Smejkal, Nucl. Phys. A919 (2013) 46. [3] A. Cieply, M. Mai, U.-G. Meissner and J. Smejkal, Nucl. Phys. A954 (2016) 17.
        Speaker: Dr Ales Cieply (Nuclear Physics Institute, 250 68 Rez, Czech Republic)
        Slides
      • 17:20
        The Muonium Antimatter Gravity Experiment 20m
        A direct measurement of the gravitational acceleration of antimatter has the potential to show that we live in a “Dirac-Milne” Universe, which could explain cosmological observations without the need for dark matter, dark energy, inflation, or missing antimatter. Such a measurement would also be sensitive to the possible existence of a fifth force. Cooling antimatter to temperatures where gravitational energies are comparable to thermal energies is challenging for most forms of antimatter, which annihilate upon contact with matter. The exception is the antimuon (μ+), which is easily cooled by stopping in cold matter, but the short muon lifetime poses challenges. Positive muons that stop in material will combine with free electrons to form muonium, a neutral leptonic atom with most of its mass derived from the 2nd-generation antimuon. We are developing the Muonium Antimatter Gravity Experiment (MAGE) to measure the gravitational force on muonium using a novel, monoenergetic, low-velocity, horizontal muonium beam directed at an ultra-precise atom interferometer. If successful, MAGE will measure for the first time the gravitational coupling to a 2nd-generation particle in a system whose antimatter-dominated mass is not predominantly strong-interaction binding energy. The novel MAGE beam production approach could also have important applications to other muonium experiments as well as to the measurement of g-2.
        Speaker: Prof. Thomas Phillips (Illinois Institute of Technology)
        Slides
    • 14:00 18:00
      Parallel P7 & P8
      • 14:00
        Dalitz plot analysis of three-body charmonium decays at BaBar 20m
        We perform Dalitz plot analyses of $J/\psi$ three-body hadronic decays to $\pi^+ \pi^-\pi^0$, $K^+ K^-\pi^0$ and $K^0_S K^{\pm} \pi^{\mp}$ using the isobar and Veneziano models. The $J/\psi$ is produced through the Inital-State-Radiation process. We also perform Dalitz plot analyses of $\eta_c$ three-body hadronic decays to $K^+ K^-\pi^0$ and $K^0_S K^{\pm} \pi^{\mp}$, where the $\eta_c$ is produced in two-photon interactions. An isobar model is used, as well as a Model Independent Partial Wave Analysis which allows to extract the amplitude and phase of the $K \pi$ S-wave up to a mass of 2.5 GeV.
        Speaker: Prof. Antimo Palano (INFN and University of Bari)
        Slides
      • 14:20
        Lambda_c to Sigma pi pi decays at Belle 20m
        Recent model-independent measurements of the absolute branching ratio of the normalisation mode Lambda_c -> p^+ K^- pi^+ by the Belle1 and BES32 collaborations have significantly increased the precision of previously measured decay channels. BES3 also independently updated the value for the Sigma^+ pi^- pi^+ mode, however the branching fraction into the Sigma^0 pi^0 pi^+ decay channel has not been improved upon since the measurement by the CLEO3 collaboration. We report new measurements of the branching fractions of the decays Lambda^+_c -> Sigma^+ pi^- pi^+, Sigma^0 pi^0 pi^+ and Sigma^+ pi^0 pi^0 based on 711/fb of integrated luminosity recorded with the Belle detector at the KEKB asymmetric energy e^+e^- collider near the Upsilon(4S) resonance (charge conjugated decays are implicitly included). All results are obtained relative to Lambda_c -> p^+ K^- pi^+. This is the first measurement of the Lambda^+_c -> Sigma^+ pi^0 pi^0 channel. The measurements of the other modes are significantly more precise compared to previous analyses and of similar precision to the recent BES3 results. 1 A. Heller et al. (Belle Collaboration) Phys. Rev. D 91, 112009 (2014) 2 M. Ablikim et al. (BESIII Collaboration) Phys. Rev. Lett. 116, 052001 (2015) 3 P. Avery et al. (CLEO Collaboration) Physics Letters B, Volume 325, Issue 1 (1994)
        Speaker: Mr Manfred Berger (Stefan Meyer Institute for subatomic Physics)
        Slides
      • 14:40
        Exotic and conventional bottomonium physics prospects at Belle II 20m
        The Belle II experiment, being constructed at the KEK laboratory in Japan, is a substantial upgrade of both the Belle detector and the KEKB accelerator. It aims at collecting 50 times more data than existing B-Factory samples beginning in 2019. Belle II is uniquely capable of studying the so-called "XYZ" particles: heavy exotic hadrons consisting of more than three quarks. First discovered by Belle, these now number in the dozens, and represent the emergence of a new category within quantum chromodynamics. This talk will present the capabilities of Belle II to explore exotic and conventional bottomonium physics. There will be a particular focus on the physics reach of the first data, where opportunities exist to make an immediate impact in this area.
        Speaker: Prof. Todd Pedlar (Luther College)
        Slides
      • 15:00
        Weibull model of multiplicity distribution in hadronic, leptonic and heavy ion collisions 20m
        We introduce the use of the Weibull distribution as a simple parametrization of charged particle multiplicities in hadron-hadron collisions at all available energies, ranging from ISR energies to the most recent LHC energies. In statistics, the Weibull distribution has wide applicability in natural processes that involve fragmentation processes. This provides a natural connection to the available state-of-the-art models for multiparticle production in hadron-hadron collisions, which involve QCD parton fragmentation and hadronization. The Weibull distribution describes the multiplicity data at the most recent LHC energies better than the single negative binomial distribution. The study has been extended to leptonic collisions and heavy ion collisions. The Weibull regularity successfully describes the higher order multiplicity moments in both hadronic and leptonic collisons. The Weibull regularity, which reproduces the multiplicity distributionsalong with the genuine correlations, seems to be the optimal model to describe the multiparticle production process.
        Speaker: Dr Sadhana Dash (IIT Bombay)
        Slides
      • 15:20
        Measurement of (anti-)hypernuclei production with ALICE at the LHC 20m
        The Large Hadron Collider (LHC) has delivered at the end of 2015 Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV. This data sample from the so-called LHC Run 2, complements the Run 1 datasets of Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV. These datasets allow for a systematic study of the light (anti-)(hyper-)nuclei production in ultra relativistic heavy ion collisions. Thanks to its excellent particle identification and tracking capabilities, the ALICE detector allows for the identification of light nuclei and the corresponding anti-nuclei in a wide momentum range. Moreover, by means of the Inner Tracking System's capability to separate primary from secondary vertices, it is possible to identify (anti-)hypertritons exploiting the two (\hyp~$\rightarrow$~\he~+~\pim) and three body (\hyp~$\rightarrow$~d~+~p~+~\pim) mesonic weak decays. The study of (anti-)hypertriton production at both energies will be discussed and findings will be compared to model predictions. Results on the measurement of (anti-)hypertriton production yields in Pb--Pb collisions along with the hypertriton lifetime will be shown. Plans for the future LHC Run 3, scheduled to start in 2021, with the expected improvements in the statistics and precision will be also presented.
        Speaker: Dr stefano piano (INFN sez Trieste)
        Slides
      • 15:40
        Coffee break 20m
      • 16:00
        Results on production of b hadrons and onia in CMS 20m
        We report measurements of the differential cross sections and polarizations of B hadron and quarkonium states. These are important tools to investigate heavy-quark production mechanisms in QCD. The dependences on transverse momentum, rapidity, and particle multiplicity are investigated. Comparisons with theory expectations and among different collision energies are provided.
        Speaker: Grant Riley (University of Tennessee)
        Slides
      • 16:20
        Production of (anti-)nuclei in small systems with ALICE at the LHC 20m
        The large sample of high quality data taken in pp collisions at $\sqrt{s} = 7$ TeV and 13 TeV and in p-Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV at the LHC with the ALICE detector allows for a systematic study of the light (anti-)nuclei production in these collision systems. The excellent performance of the Inner Tracking System, the Time Projection Chamber and the Time-Of-Flight detector provide a clear identification and separation of primary produced light (anti-)nuclei from secondaries. Additionally, the high energy deposit of Z=2 particles in the Transition Radiation Detector has been exploited to collect a hardware-triggered data sample in the high-interaction rate p-Pb collisions at $\sqrt{s_{\rm NN}}$ = 8.16 TeV. First findings from this (anti-)nuclei enriched sample will be shown. New results on (anti-)deuteron production as a function of multiplicity in pp and p-Pb collisions will be presented, as well as the measurement of (anti-)helium-3 in p-Pb collisions. The goal is to study production mechanisms such as coalescence in small systems, and to compare them to those in heavy-ion collisions. Finally, perspectives will be given for studies with the increased statistics from the LHC Run II.
        Speaker: Benjamin Dönigus (GSI, Darmstadt)
        Slides
      • 16:40
        Results on B hadron properties in CMS 20m
        We present precise measurements of decay properties of hadrons containing a b quark performed on the data collected by the CMS experiment at LHC. The lifetime is among the fundamental properties of particles and in heavy hadrons it is one of the important observables that allows to test the theoretical tools describing their physics. Some of the reported measurements are at the precision level of the world average for these properties.
        Speaker: Thomas Madlener (HEPHY, Vienna)
        Slides
      • 17:00
        Precision comparison of light nuclei and anti-nuclei mass-to-charge ratio with ALICE at LHC 20m
        The measurement of the mass-to-charge ratio difference between nuclei and anti-nuclei probes the possibility of subtle differences between the way protons and neutrons bind together in nuclei compared with how their respective anti-particles form anti-nuclei. Such a study provides a quantitative verification of the matter/anti-matter symmetry in the context of the nuclear forces, a remnant of the underlying strong interaction between quarks and gluons. Relativistic heavy ion collisions at the CERN Large Hadron Collider (LHC) provide a copious source of matter and anti-matter particles. They create suitable conditions for producing light nuclei and anti-nuclei with nearly identical abundances. Thanks to its excellent tracking and particle identification capabilities, the ALICE experiment allows the investigation of these produced (anti-)matter states at LHC. The experiment makes accurate measurement of the curvature of particle tracks in the detector's magnetic field and of the particles' time of flight, and this information is used to determine the mass-to-charge ratio mu = m/z for nuclei and anti-nuclei. The precision comparison of the deuteron and anti-deuteron, and the 3He and 3Hebar nuclei mass-to-charge ratio will be presented. The precision of the measurement of the relative differences Δmu_ddbar/mu_d = [0.9 ± 0.5 (stat.) ± 1.4 (syst.)] x 10^-4 and Δmu_3He3Hebar/mu_3He = [-1.2 ± 0.9 (stat.) ± 1.0 (syst.)] x 10^-3 improves by one to two orders of magnitude with respect to analogous results obtained more than 40 years ago. Combining these results with existing measurements of the masses of the anti-nucleons, the relative binding energy differences are extracted, Δe_ddbar/e_d = -0.04 ± 0.05 (stat.) ± 0.12 (syst.) and Δe_3He3Hebar/e_3He = 0.24 ± 0.16(stat.) ± 0.18 (syst.). These results test, to an unprecedented precision, the CPT invariance in the sector of light (anti-)nuclei. Interestingly, these results are obtained in a high energy physics experiment at LHC designed for other purposes. Perspectives of improved limits with a future larger data set will be also discussed.
        Speaker: Mr Manuel Colocci (Università e INFN, Bologna)
        Slides
      • 17:20
        Searches for exotic QCD bound states with ALICE at the LHC 20m
        The high energy densities reached at LHC lead to the production of a significant amount of light hypernuclei as well as (anti-)nuclei which are consequently observed in several collision systems, namely from proton-proton (pp), to proton-lead (p-Pb) up to lead-lead (Pb-Pb) collisions. Several potentially existing exotic QCD bound states, such as the H- dibaryon, could be produced and they feature many similarities to known hyper- and anti- nuclei. The excellent particle identification performance of the ALICE experiment allows for the possible detection of these rarely produced particles. The presence of the Inner Tracking System detector close to the interaction point, enables the primary produced particles to be distinguished from the ones coming from other sources such as weak decays. In this contribution, the expected production rates for exotic states based on the latest ALICE measurements of (anti-)nuclei and hyper-nuclei and their comparison to theoretical model predictions will be discussed first. Then the estimated upper limits for the Λn and H-dibaryon exotic bound state production will be presented. Finally the expected improvements in such measurements with the increased statistics and performance in the next LHC Run periods will be discussed.
        Speaker: Dr Annalisa Mastroserio (INFN Bari)
        Slides
    • 19:00 21:30
      Conference dinner 2h 30m

      La Creperie
      An der Oberen Alten Donau 6
      1210 Wien

    • 09:00 09:30
      Theoretical aspects of precision ex periments with neutrons 30m
      Speaker: Dr Vincenzo Cirigliano (Los Alamos National Laboratories)
      Slides
    • 09:30 10:00
      Experiments with ultra-cold neutrons at the Institut Laue-Langevin 30m
      Experiments with ultra-cold neutrons provide a powerful probe of models of the early universe at the precision frontier. Flagship experiments with ultra-cold neutrons measure the lifetime of the free neutron, search for its electric dipole moment, and study gravity by means of resonance spectroscopy methods. For this purpose, the Institute Laue-Langevin (ILL) in Grenoble, France, an international research centre at the leading edge of neutron science and technology, operates two ultra-cold neutron installations. After a brief introduction of the ILL with a special focus on major activities in nuclear and particle physics, the ultra-cold neutron installations will be presented in more detail. The scope of fundamental physics studies with ultra-cold neutrons is outlined, and the ongoing research program using ultra-cold neutrons is highlighted.
      Speaker: Dr Tobias Jenke (Institut Laue-Langevin)
      Slides
    • 10:00 10:30
      Search for the neutron electric dipole moment at the Paul Scherrer Institute 30m
      S. Roccia, on behalf of the nEDM collaboration (http://nedm.web.psi.ch/) At the Paul Scherrer Institute, a collaboration of 15 institutions is conducting an experiment to search for a permanent neutron electric dipole moment. The experiment uses ultracold neutrons (UCN) stored in vacuum at room temperature. This technique provided the last (and best) limit by the RAL/Sussex/ILL collaboration in 2006: 2.9 × 10-26 e cm (90% C.L.). We aim at improving this limit using an upgrade of the same apparatus. The data taking is finishing and an overview of the sensitivity will be given together with a status report on the control of the systematic effects. In particular I will discuss some of the most recent developments and their impact on the sensitivity and conclude with the perspectives of this collaborative work. Also the collaboration is preparing a next generation apparatus, named n2EDM. I will present the key aspects of its design.
      Speaker: Dr Stephanie Roccia (CSNSM Universite Paris Sud)
      Slides
    • 10:30 11:00
      Coffee break 30m
    • 11:00 11:30
      Precision Neutron Lifetime Measur ement using a Magneto-Gravitational Trap 30m
      Speaker: Chen-Yu Liu (Indiana University)
      Slides
    • 11:30 12:00
      PERKEO III - results and perspective s 30m
      Speaker: Bastian Maerkisch (TU Munich)
      Slides
    • 12:00 12:30
      Fundamental physics with neutrons at t he ESS 30m
      Speaker: Torsten Soldner (Institut Laue Langevin)
      Slides
    • 12:30 14:00
      Lunch break 1h 30m
    • 14:00 14:30
      The Muon g-2 experiment at Fermilab 30m
      The anomalous magnetic dipole moment of the muon can be measured and computed to very high precision, making it a powerful probe to test the standard model and search for new physics. The previous measurement by the Brookhaven E821 experiment found a ~3 standard deviation discrepancy from the predicted value. The new g-2 experiment at Fermilab is intended to improve the precision by a factor of 4, obtained by a factor twenty increase in statistics and a reduced systematic uncertainty with an upgraded apparatus. The experiment will also carry out an improved measurement of the muon electric dipole moment. Construction and commissioning at Fermilab are almost completed and data taking is expected in late 2017. An overview of the whole system and results of test runs will be reported.
      Speaker: Dr Andrea Fioretti (Istituto Nazionale di Ottica , CNR, S.S. di Pisa and INFN, Sezione di Pisa, Italy)
      Slides
    • 14:30 15:00
      Quarkonium Theoretical Aspects 30m
      Speaker: Nora Brambilla (TUM)
      Slides
    • 15:00 15:30
      Belle studies of exotic hadrons with heavy flavors 30m
      Exploiting the world highest luminosity electron-positron collision data provided by the KEKB collider, Belle experiment has brought many interesting results on the exotic hadrons with heavy flavors. Striking discoveries as well as variety of studies to reveal properties of those exotic states are reviewed and still possible extensions of the relevant activities are discussed.
      Speaker: Prof. Kenkichi Miyabayashi (Nara Women's University)
      Slides
    • 15:30 16:00
      Coffee break 30m
    • 16:00 16:30
      Heavy hadron interactions from Lattice QCD 30m
      Speaker: Daniel Mohler (GSI, Darmstadt)
      Slides
    • 16:30 17:00
      Hadron Spectroscopy at LHCb 30m
      Speaker: Prof. Antimo Palano (INFN and University of Bari)
      Slides
    • 17:00 17:30
      Hadron physics with ALICE at the LHC 30m
      (for the ALICE collaboration) The Large Hadron Collider collides protons and also lead ions (Pb) at energies of several TeV per nucleon-nucleon pair. In the case of Pb-Pb collisions, an extended volume of de-confined hot QCD matter is created which expands and cools, creating thousands of hadrons in a relatively small volume. This allows a rich programme of hadron physics to be pursued with A Large Ion Collider Experiment (ALICE). Measurements in ALICE of the relative yields of some of the more common hadrons, π, K, p, and Λ support the hypothesis that the hadrons are created at a common temperature of around 155 MeV (1.8 x 10^12 K). We also observe yields of light nuclei and hyper-nuclei consistent with this temperature and approximately equal numbers of the respective anti-nuclei; anti-deuterons, anti-^3He and anti-^4He. With sufficiently large data samples we can observe enough anti-nuclei to explore their properties, such as our measurement of the difference in mass of the deuteron and anti-deuteron. All the hadron species and nuclei abundances that we see are in broad agreement with a thermal production scenario which leads to the hypothesis that other, as yet unobserved, hadron states would, if they exist, follow this pattern. This novel means of potentially accessing exotic hadrons allows us to conduct searches, initially for di-baryon states and their anti-particles. Finally, the hadrons which are produced apparently interact for a finite length of time, modifying the ratio of resonant to non-resonant states e.g. K*(892)/K. The final scattering between hadrons is sensitive to the interaction strength and the results of investigations using correlation techniques, among various meson and baryon species, are presented.
      Speaker: Dr Lee Barnby (University of Derby)
      Slides
    • 17:30 18:00
      Searches for magnetic monopoles and beyond with MoEDAL at the LHC 30m
      The MoEDAL experiment at the LHC is optimised to detect highly ionising particles such as magnetic monopoles, dyons and (multiply) electrically charged stable massive particles predicted in a number of theoretical scenarios. MoEDAL, deployed in the LHCb cavern, combines passive nuclear track detectors with magnetic monopole trapping (MMT) volumes, while spallation-product backgrounds are being monitored with an array of MediPix pixel detectors. An introduction to the detector concept and its physics reach, complementary to that of the large general purpose LHC experiments ATLAS and CMS, will be given. Emphasis will be given to the first MoEDAL results, where the null results from a search for magnetic monopoles in MMTs exposed in 2012 LHC collisions are used to set the first LHC limits on particles with magnetic charges more than 1.5 Dirac charge. The potential to search for heavy, long-lived supersymmetric electrically-charged particles and multi-charged states is also discussed.
      Speaker: Dr Vasiliki Mitsou (IFIC - CSIC / Valencia Univ.)
      Slides
    • 09:00 09:30
      EDM Experiments at Storage Rings 30m
      According to our present understanding, the early Universe contained the same amount of matter and anti-matter and, if the Universe had behaved symmetrically as it developed, every particle would have been annihilated by one of its antiparticles. One of the great mysteries in the natural sciences is therefore why matter dominates over antimatter in the visible Universe. The breaking of the combined charge conjugation and parity symmetries (CP-violation, CPV) in the Standard Model of particle physics (SM) is insufficient to explain this and further sources of CPV must be sought. These could manifest themselves in electric dipole moments (EDMs) of elementary particles, which occur when the centroids of positive and negative charges are mutually and permanently displaced. An EDM observation would also be an indication for physics beyond the SM. No EDM has been observed so far; after its discovery, investigations on different systems will be required to pin down CPV sources. In this respect the idea to search for EDMs of charged hadrons (i.p. proton and deuteron) in a new class of precision storage rings has recently been put forward. In addition such searches bear the potential to reach sensitivities of 10-29 e cm. The EDM measurement principle, the time development of the polarization vector subject to a perpendicular electric field, is simple, but the smallness of the effect makes this an enormously challenging project. A stepwise approach, from R&D for key-technologies towards the holy grail of a double-beam precision storage ring with counter-rotating beams, is needed. The ongoing research of the JEDI Collaboration at the cooler synchrotron COSY of Forschungszentrum Jülich (Germany) provides invaluable information: recent experimental milestones will be presented and discussed.
      Speaker: Prof. Hans Ströher (Forschungszentrum Jülich)
      Slides
    • 09:30 10:00
      Antinucleon-nucleon interaction in chiral effective field theory 30m
      Results of a study of the antinucleon-nucleon interaction within chiral effective field theory are presented. This novel approach suggested by Weinberg has been applied rather successfully to the nucleon-nucleon interaction and can be adapted straightforwardly to the antinucleon-nucleon system. So far the antinucleon-nucleon potential has been derived up to next-to-next-to-next-to-leading order in the chiral expansion. The low-energy constants associated with the arising contact interactions are fixed by a fit to phase shifts and inelasticities provided by a recently published phase-shift analysis of antiproton-proton scattering data. The achieved description of the antinucleon-nucleon amplitudes is excellent and of a quality comparable to the one found in case of the nucleon-nucleon interaction at the same order. As a special application of the antinucleon-nucleon potential predictions for the electromagnetic form factors of the proton in the time-like region are presented.
      Speaker: Johann Haidenbauer (Forschungszentrum Juelich GmbH, D-52425 Juelich, Germany)
      Slides
    • 10:00 10:30
      The detector of the PANDA experiment at FAIR 30m
      The PANDA experiment is the main hadron physics addressing experiment of the future FAIR (Facility for Antiproton and Ion Research) center at Darmstadt, Germany. Located at the HESR antiproton storage ring the PANDA detector is optimized for physics of the strong and weak interactions in the charm sector, that is search for new and exotic states of matter, precise determination of quantum numbers and line shapes of hadronic resonances and deeper insights in the structure of hadrons. The detector consists of a target spectrometer build around the interaction region of the 1.5-15 GeV antiprotons with a fixed hydrogen target and a forward spectrometer in beam direction. Its design is based on versatility and compactness while achieving high resolution, rate capability and physics selectivity. The presentation will cover the different vertexing, tracking, particle identification, and calorimetry subsystems as well as detector control and data aquisition.
      Speaker: Dr Thomas Held (Bochum University)
      Slides
    • 10:30 11:00
      Coffee break 30m
    • 11:00 11:30
      The international research facility FAIR 30m
      Speaker: Thomas Stöhlker (GSI, Darmstadt)
      Slides
    • 11:30 12:00
      PANDA Physics at FAIR 30m
      The PANDA experiment will exploit matter antimatter annihilations at the international accelerator Facility for Antiproton and Ion Research in Europe (FAIR) to investigate fundamental questions of hadron and nuclear physics. High interaction rates of cooled antiprotons, of 1.5 to 15GeV/c, with a fixed proton or nuclear target together with an unprecedented beam momentum precision enable a broad hadron physics program in the charmed and multi-strange sector capable to deliver decisive contributions to open questions of QCD. This talk highlights the physics goals envisaged throughout the phases of the PANDA experiment at FAIR.
      Speaker: Anastasios Belias (GSI, Darmstadt)
      Slides
    • 12:00 12:30
      Some recent developments in QCD spectroscopy 30m
      Important developments have recently taken place in the spectroscopy of light quark mesons and baryons in measurements made at at the CESER electron-positron collider, and at the new GlueX photon facility at the electron accelerator at the Jefferson Laboratory. These include first measurements of the production of lambda, sigma, cascade and omega hyperons and their electromagnetic form factors, and photo production of J/psi and new light quark mesons at GlueX. A review of these and other developments in QCD spectroscopy will be presented, and future prospects discussed.
      Speaker: Prof. Kamal Seth (Northwestern University, Evaston, USA)
      Slides