Leptogenesis from reheating after inflation and cosmic string decay

Details Leptogenesis from reheating after inflation and cosmic string decay Leptogenesis from reheating after inflation and cosmic string decay

2005-07-13

arxiv.org/abs/hep-ph/0507162v2

JCAP 0512 (2005) 006

Physics

High Energy Physics

High Energy Physics - Phenomenology

33 pages, 7 figures

Scientific paper

10.1088/1475-7516/2005/12/006

Cosmic strings form at the end of standard supersymmetric hybrid inflation, and both inflation and strings contribute to the CMB anisotropies. If the symmetry which is broken at the end of inflation is gauged $B$-$L$, there is a mixed scenario for leptogenesis: Right-handed neutrinos can be produced non-thermally during reheating via inflaton decay as well as via cosmic string decay. We show that the parameter space consistent with CMB data can accommodate either or both scenarios depending on the mass of the right-handed neutrinos.

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