München 2009 – scientific programme

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T: Fachverband Teilchenphysik

T 23: Theoretische Astroteilchenphysik und Kosmologie 2

T 23.5: Talk

Tuesday, March 10, 2009, 17:45–18:00, M114

Leptogenesis is hot! - Thermal corrections — •Clemens Kießig — Max-Planck-Institut für Physik, München

Leptogenesis is an attractive model for explaining the baryon asymmetry of the universe, since efforts to explain the smallness of neutrino masses via the seesaw mechanism automatically point to this specific baryogenesis model. As calculations have become more refined, thermal corrections need to be taken into account using thermal field theory methods. As thermal masses have been used as kinematical masses, it is desirable to check this approximation via a more consistent field theoretical treatment. I will give an overview of thermal corrections and present some results concerning the use of thermal masses and the HTL (hard thermal loop) approximation.