CPT violation, Lorentz violation, and exotic atoms (Antihydrogen: CPT and gravity)

• Arnaldo Vargas (Indiana University)

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.

High-precision measurements of the antiproton's fundamental properties (Antihydrogen: CPT and gravity)

• Christian Smorra (RIKEN Fundamental Symmetries Laboratory)

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.

Laser spectroscopy of antiprotonic helium

• Masaki Hori (Max-Planck Institute for Quantum Optics)

The GBar experiment and a planned mea surement of the lamb shift in antihydrogen

• Paolo Crivelli (Institute for Particle Physics, ETH Zurich)

Measurement of the hydrogen hyperfin e splitting - towards antihydrogenspectroscopy

• Chloé Malbrunot (CERN)

Observation of the 1S-2S transition in trapped antihydrogen (Antihydrogen: CPT and gravity)

• Niels Madsen (Swansea University)

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

AEgIS - Latest results (Antihydrogen: CPT and gravity)

• Francesco Guatieri (TIFPA - INFN)

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.

The ELENA deceleration ring at CERN ELENA (Future facilities and instrumentation)

• Christian Carli (CERN)

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.

Hyperfine structure of antihydrogen

• Naofumi Kuroda (University of Tokyo)

The first result of presice muonium hyperfine measurement in J-PARC (Leptonic atoms: QED and gravity)

• Yasuhiro Ueno (University of Tokyo)

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.

Electrostatic manipulation of Rydberg positronium atoms (Leptonic atoms: QED and gravity)

• David Cassidy (UCL)

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).

A revised value of the Rydberg constant from muonic and electronic atoms (Leptonic atoms: QED and gravity)

• Randolf Pohl (Max-Planck-Institut für Quantenoptik)

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).

Experimental study of hyperon resonances below the KbarN thresold at J-PARC (Kaon-nucleon and kaon-nucleus interaction)

• Hiroyuki Noumi (Research Center for Nuclear Physics, Osaka University)

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

Kaonic nuclei studied via K- induced reactions at J-PARC (Kaon-nucleon and kaon-nucleus interaction)

• Tadashi Hashimoto (JAEA)

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.

A study of the in-flight 3He(K-,Lambdap)n reaction and the “K-pp” bound state (Kaon-nucleon and kaon-nucleus interaction)

• Angels Ramos (University of Barcelona)

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.

Low energy interaction studies of negative kaons in light nuclear targets by AMADEUS (Kaon-nucleon and kaon-nucleus interaction)

• kristian piscicchia (LNF INFN CENTRO FERMI)

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.

Constraining the antikaon-nucleon interaction from the 1S level shift of kaonic deuterium (Kaon-nucleon and kaon-nucleus interaction)

• Wolfram Weise (ECT* and TU Munich)

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.

Single- and multi-nucleon $K^-$ interactions with nuclei near threshold (Kaon-nucleon and kaon-nucleus interaction)

• Eliahu Friedman (Racah Inst. Physics, Hebrew University, Jerusalem, Israel)

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.

Mesons in the medium - what have we learned?* (Hadron physics with antiprotons)

• Mariana Nanova (II. Phys. Inst., University of Giessen, Germany)

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)

Lattice QCD studies of Dibarion candidates (Low-energy QCD)

• Shinya GONGYO (RIKEN)

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.

Review of lattice results concerning lo w energy particle physics

• Urs Wenger (University of Bern)

Observation of pi-K+ and pi+K- atoms (Low-energy QCD)

• Valeriy Yazkov (Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University)

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.

Results and prospects for low-energy QCD processes from COMPASS (Low-energy QCD)

• Jan Friedrich (TU München)

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.

The current status of fundamental physic s at J-PARC including hadron physics,and future plans with upgrades

• Naohito Saito (KEK)

Theoretical aspects of precision ex periments with neutrons

• Vincenzo Cirigliano (Los Alamos National Laboratories)

Experiments with ultra-cold neutrons at the Institut Laue-Langevin (Precision experiments with cold neutrons)

• Tobias Jenke (Institut Laue-Langevin)

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.

Search for the neutron electric dipole moment at the Paul Scherrer Institute (Precision experiments with cold neutrons)

• Stephanie Roccia (CSNSM Universite Paris Sud)

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.

Precision Neutron Lifetime Measur ement using a Magneto-Gravitational Trap

• Chen-Yu Liu (Indiana University)

PERKEO III - results and perspective s

• Bastian Maerkisch (TU Munich)

Fundamental physics with neutrons at t he ESS

• Torsten Soldner (Institut Laue Langevin)

The Muon g-2 experiment at Fermilab (Future facilities and instrumentation)

• Andrea Fioretti (Istituto Nazionale di Ottica , CNR, S.S. di Pisa and INFN, Sezione di Pisa, Italy)

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.

Quarkonium Theoretical Aspects

• Nora Brambilla (TUM)

Belle studies of exotic hadrons with heavy flavors (Hadron physics at LHC)

• Kenkichi Miyabayashi (Nara Women's University)

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.

Heavy hadron interactions from Lattice QCD

• Daniel Mohler (GSI, Darmstadt)

Hadron Spectroscopy at LHCb

• Antimo Palano (INFN and University of Bari)

Hadron physics with ALICE at the LHC (Hadron physics at LHC)

• Lee Barnby (University of Derby)

(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.

Searches for magnetic monopoles and beyond with MoEDAL at the LHC (Hadron physics at LHC)

• Vasiliki Mitsou (IFIC - CSIC / Valencia Univ.)

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.

EDM Experiments at Storage Rings (Future facilities and instrumentation)

• Hans Ströher (Forschungszentrum Jülich)

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.

Antinucleon-nucleon interaction in chiral effective field theory (Hadron physics with antiprotons)

• Johann Haidenbauer (Forschungszentrum Juelich GmbH, D-52425 Juelich, Germany)

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.

The detector of the PANDA experiment at FAIR (Future facilities and instrumentation)

• Thomas Held (Bochum University)

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.

The international research facility FAIR

• Thomas Stöhlker (GSI, Darmstadt)

PANDA Physics at FAIR (Hadron physics with antiprotons)

• Anastasios Belias (GSI, Darmstadt)

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.

Some recent developments in QCD spectroscopy (Hadron physics at LHC)

• Kamal Seth (Northwestern University, Evaston, USA)

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.