Dr
Alexei Voronin
(P.N. Lebedev Physical Institute)
12/09/2017, 14:00
Antihydrogen: CPT and gravity
Oral presentation
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....
Prof.
Yury Uzikov
(Joint Institute for Nuclear Researches)
12/09/2017, 14:20
Antihydrogen: CPT and gravity
Oral presentation
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]....
Tim Friesen
(Aarhus University)
12/09/2017, 14:40
Antihydrogen: CPT and gravity
Oral presentation
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...
Ms
Bernadette Kolbinger
(Stefan Meyer Institute for Subatomic Physics, Austrian Academy of Sciences, Boltzmanngasse 3, 1090 Vienna, Austria)
12/09/2017, 15:00
Antihydrogen: CPT and gravity
Oral presentation
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...
Dr
Joseph T K McKenna
(TRIUMF)
12/09/2017, 15:20
Antihydrogen: CPT and gravity
Oral presentation
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...
Dr
Henry Lamm
(University of Maryland)
12/09/2017, 16:00
Leptonic atoms: QED and gravity
Oral presentation
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...
Dr
Andrea Fontana
(INFN Pavia)
12/09/2017, 16:20
Leptonic atoms: QED and gravity
Oral presentation
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...
Prof.
Dimitar Bakalov
(Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences)
12/09/2017, 16:40
Leptonic atoms: QED and gravity
Oral presentation
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.
Dr
Eryk Czerwiński
(Institute of Physics, Jagiellonian University)
12/09/2017, 17:00
Leptonic atoms: QED and gravity
Oral presentation
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...
Ms
Ivana Belosevic
(Institute for Particle Physics, ETH Zurich)
12/09/2017, 17:20
Future facilities and instrumentation
Oral presentation
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...
Prof.
cody storry
(York University)
12/09/2017, 17:40
Future facilities and instrumentation
Oral presentation
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...
