International Conference on Precision Physics and Fundamental Physical Constants (FFK-2019)

Session

Session 3: Exotic atoms

10 Jun 2019, 16:45

Balaton Limnological Research Institute of the Hungarian Academy of Sciences

Conveners

Session 3: Exotic atoms

• Vladimir Korobov (Joint Institute for Nuclear Research (JINR))

34. Precision measurements of antiproton and antihydrogen properties at CERN

Eberhard Widmann (Austrian Academy of Sciences (AT))

10/06/2019, 16:45

The CERN Antiproton Decelerator, the only source of low-energy cooled antiproton beams in the world, will be extended by the ELENA storage ring to provide even lower energy antiprotons, thus increasing the number of antiprotons trapped in charged-particle traps or low density gas. The antiprotons are used for precision measurement or to form antihydrogen, the simplest anti-atom consisting of...

79. Muonic atoms and proton size

Randolf Pohl (Johannes Gutenberg University Mainz, Germany)

10/06/2019, 17:15

Randolf Pohl (JGU Mainz) for the CREMA Collaboration and the Garching Hydrogen Project

Muonic hydrogen atoms have for a long time been recognized as the ideal tool to study nuclear properties such as charge radii, (magnetic) Zemach radii, or nuclear polarizabilities. Our laser spectroscopy measurements of the Lamb shift in light muonic atoms (H, D, He-3 and He-4) have yielded charge radii...

46. Hyperfine Splitting in Muonium: Theory meets Experiment

Michael Eides (University of Kentucky)

10/06/2019, 17:40

Theory of hyperfine splitting in muonium and perspectives of its improvement will be reviewed. Emphasis will be on the controversial estimate accuracy of the theoretical prediction. Comparison between theory and the existing and future experimental data will be discussed.

15. The virtual-Delbruck-scattering potential for light muonic atoms

Evgeny Korzinin

10/06/2019, 18:05

Light-by-light contributions to the Lamb shift in light muonic atoms were some time ago considered in [1,2]. Those include the so called Wichmann-Kroll potential and the virtual Delbruck scattering in nonrelativistic approximation. The result for the latter was presented in term a few master integrals in momentum space with complicated spectral functions. Here we investigate the potential...

35. FAMU: latest results in the measurement of the transfer rate from mu-p to higher-Z elements

Cecilia Pizzolotto (INFN - National Institute for Nuclear Physics)

10/06/2019, 18:30

The main goal of the FAMU experiment is to measure for the first time the hyperfine
splitting of the muonic hydrogen ground state and, through this measurement, to determine the proton Zemach radius. To achieve this result, it is necessary to characterize first the muon transfer mechanism from muonic hydrogen to higher-Z elements. This study has been carried on by the FAMU collaboration at...

78. Present status of muonium hyperfine splitting in J-PARC

Koichiro Shimomura (KEK)

10/06/2019, 18:55

Muonium is the bound state of a positive muon and an electron. Muonium Spectroscopy Experiment Using Microwave (MuSEUM) is a new precise measurement of muonium hyperfine structure (MuHFS) at Japan Proton Accelerator Research Complex (J-PARC).
There are two major motivations for this new measurement.
1. Test of the bound-state Quantum Electrodynamics (QED). Muonium is a purely leptonic system...