Nagoya University
Theoretical Elementary Particle Physics Laboratory

Date&Time Tue Jan 18 2022 (17:00 - 18:00)
Shohei Okawa
Affiliation Universitat de Barcelona
Title Long-range axion forces and hadronic CP violation
Abstract Axions and other pseudoscalar fields comprise an interesting class of ultralight dark matter candidates, that may independently play a role in solving the strong CP problem. In the presence of CP-violating sources, these pseudoscalar fields can develop a coherent non-derivative coupling to nucleons, gaNN, thus mediating ‘mass-mass’ and ‘mass-spin’ forces in matter that can be probed experimentally. We revisit the non-perturbative generation of these CP-odd axion forces, and refine estimates of gaNN generated by the EDMs and color EDMs of quarks. We also revisit the Standard Model contribution to CP-odd axion couplings generated by the phase of the Cabibbo-Kobayashi-Maskawa quark mixing matrix.
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