Abstract
The prospects of tests of CPT symmetry using precision spectroscopy of antihydrogen are discussed with special emphasis on the ground-state hyperfine structure, a measurement of which is the aim of the ASACUSA collaboration at the AD/ELENA facility of CERN. Ongoing parallel experiments using hyperfine spectroscopy of hydrogen and deuterium aiming at studying Lorentz invariance by determining coefficients of the Standard Model Extension framework are described.
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Notes
In the following, precision stands for, unless otherwise stated, relative precision.
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ACKNOWLEDGMENTS
The authors thanks his colleagues of the ASACUSA collaboration for the continuous cooperation and many fruitful discussions, in particular T. Yamazaki, as well as extensive discussions with S. Karshenboim, V.A. Kostelecky, and R. Lehnert.
Funding
The work was supported by the Austrian Science Fund (FWF): W1252-N27, the Grant-in-Aid for Specially Promoted Research 24000008 of Japanese MEXT, Special Research Projects for Basic Science of RIKEN, and Università di Brescia and Istituto Nazionale di Fisica Nucleare.
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Widmann, E., for the ASACUSA Cusp Collaboration. Hyperfine Spectroscopy of Antihydrogen, Hydrogen, and Deuterium. Phys. Part. Nuclei 53, 790–794 (2022). https://doi.org/10.1134/S1063779622040141
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DOI: https://doi.org/10.1134/S1063779622040141