Seminar of Department of Theoretical Physics - Peter Maták (12.11.2024)

Tuesday 12.11.2024 at 14:50, Lecture room F1/125

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Peter Maták:
Leptogenesis from asymmetric Dirac neutrino scatterings

Abstract:
In the first part of the seminar, we focus on the origin and general properties of CP asymmetric reactions, which are needed to generate the matter-antimatter asymmetry according to the Sakharov conditions. Then, in the second part, a leptogenesis model will be introduced, in which massless right-handed neutrinos undergoing ultraviolet freeze-in are the only out-of-equilibrium particles. It will be shown that even though the lepton number source term vanishes, opposite asymmetries of the decoupled right-handed neutrinos and standard model leptons are washed in.

The seminar is primarily based on [Phys. Rev. D 110 (2024) 055042].

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