Volume 476 -
42nd International Conference on High Energy Physics
(ICHEP2024) -
Astroparticle Physics and Cosmology Posters
Thermal effects in CPT and unitarity constraints for higher-order CP asymmetries
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Pre-published on:
December 23, 2024
Published on:
April 29, 2025
Abstract
Unitarity and CPT symmetry constrain the CP asymmetries entering the Boltzmann equation for net particle number generation. These constraints often manifest as cancelations of the leading-order asymmetries in decays and scatterings. This contribution considers the asymmetries of seesaw type-I leptogenesis with top-Yukawa corrections. Even when starting with Maxwell-Boltzmann phase-space densities, some of the contributions required by unitarity and CPT symmetry are interpreted as approximations of quantum statistics and thermal-mass effects. The work is based on JCAP10 (2022) 042.
DOI: https://doi.org/10.22323/1.476.0722
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Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.