SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 102: Invited Topical Talks III-B

T 102.4: Eingeladener Vortrag

Donnerstag, 23. März 2023, 15:00–15:20, HSZ/0004

New Ideas for Baryo- and Leptogenesis — •Kai Schmitz — Institut für Theoretische Physik, WWW Münster

The baryon asymmetry of the Universe (BAU) cannot be explained by the Standard Model and hence represents important evidence for new physics. In this talk, I will review recent new ideas for the generation of the BAU in the early Universe that generalize or are complementary to conventional scenarios of baryo- and leptogenesis. Specifically, I will discuss the interplay between lepton number/flavor violation and the chemical transport in the Standard Model plasma at high temperatures, which provides the basis for new scenarios known as "wash-in leptogenesis" and "leptoflavorgenesis". I will highlight possible UV completions of these scenarios, notably cosmic inflation driven by an axion-like field, and outline their rich phenomenological implications for particle physics and cosmology. This will include the possibility that the generation of the BAU is in fact closely related to the generation of primordial magnetic fields, which in turn would have important consequence for the electroweak phase transition and the properties of intergalactic magnetic fields in the present Universe.