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T: Fachverband Teilchenphysik

T 42: Astroteilchenphysik/Kosmologie (Theorie) 1

T 42.2: Vortrag

Dienstag, 28. März 2017, 11:15–11:30, VSH 17

Gauge Corrections to Leptogenesis I — Frederik Depta, •Andreas Halsch, and Owe Philipsen — Institut für Theoretische Physik, Goethe-Universität Frankfurt, Max-von-Laue-Str. 1, 60438 Frankfurt am Main, Germany

An attractive scenario for baryogenesis in the early universe is provided by leptogenesis through the decay of heavy Majorana neutrinos and subsquent conversion of lepton number to baryon number. We consider the quantum field theoretical calculation of the lepton asymmetry by solving Kadanoff-Baym equations as a systematic alternative to solving Boltzmann equations. In particular, we discuss the necessity for inclusion of gauge corrections and identify the relevant diagrams to be computed.