Year: 2025
Type: article
Abstract: We present in the conventional equilibrium approach to leptogenesis the complete leading order prediction for the CP asymmetry factor in finite-temperature decays involving Majorana neutrinos. As thermal effects are generally not negligible, the knowledge of the high temperature behavior of the underlying particle physics model, in particular that of mass generation, is required for reliable estimates of matter–antimatter asymmetry through the mechanism of leptogenesis. We present all necessary information needed to obtain the full one-loop evaluation for the thermal CP asymmetry factors for the processes $$N_i\rightarrow \phi + L$$ N i → ϕ + L and $$\phi \rightarrow N_i+L$$ ϕ → N i + L at temperatures where they are kinematically allowed. We present a numerical comparison with previous formulae given in the literature.
Source: The European Physical Journal C
Authors: Károly Seller, Zsolt Szép, Zoltán Trócsányi
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
Awards: G1943662793, G2190636616, G298428782
OpenAlex ID: W4416226770