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17–24 Jul 2024
Prague
Europe/Prague timezone

Thermal effects in CPT and unitarity constraints for higher-order CP asymmetries

19 Jul 2024, 19:00
2h
Foyer Floor 2

Foyer Floor 2

Poster 08. Astro-particle Physics and Cosmology Poster Session 2

Speaker

Viktor Zaujec (Comenius University (SK))

Description

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. In this poster, we consider 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.

Alternate track 03. Beyond the Standard Model
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Primary authors

Dr Peter Matak (Comenius University (SK)) Tomas Blazek (Comenius University (SK)) Viktor Zaujec (Comenius University (SK))

Presentation materials