Bonn 2010 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 23: Theoretische Astroteilchenphysik und Kosmologie I

T 23.6: Vortrag

Mittwoch, 17. März 2010, 15:15–15:30, HG XV

Resonant Dirac Leptogenesis on Throats — •Andreas Bechinger and Gerhart Seidl — Universität Würzburg

We consider resonant Dirac leptogenesis on a multi-throat geometry. The baryon asymmetry in the universe is generated by resonant decays of heavy Kaluza-Klein scalars that are copies of the standard model Higgs. Discrete exchange symmetries between the throats are responsible for establishing two key features of the model. First, they ensure a near degeneracy of the scalar masses and thus a resonant decay of the scalars. Second, the discrete symmetries connect the observed baryon asymmetry with the Yukawa couplings of the low-energy theory. This enables to discuss possible phenomenological implications.