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A scenario for leptogenesis at the TeV scale

Asmaa Abada
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Abstract

We propose a scenario of thermal leptogenesis at the TeV scale in the context of an extension of the Standard Model with 4 generations. We also add one right-handed Majorana neutrino for each generation to generate left handed neutrino masses via see-saw. The rôle of the fourth lepton doublet is not much different from that of a supersymmetric partner, so the leptogenesis consequences of a four generation scenario are indicators of a more generic picture. We obtain a value for the baryon asymmetry of the Universe in accordance with observations by solving the full set of coupled Boltzmann equations for this model.

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Asmaa Abada. 2005-12-01. A scenario for leptogenesis at the TeV scale. https://arxiv.org/abs/hep-ph/0512018

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