Spontaneous Non-thermal Leptogenesis in High-scale Inflation Models

Details Spontaneous Non-thermal Leptogenesis in High-scale Inflation Models Spontaneous Non-thermal Leptogenesis in High-scale Inflation Models

2006-11-06

arxiv.org/abs/hep-ph/0611055v2

Phys.Rev.D74:123523,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, 1 figure. v2: references added, accepted for publication in PRD

Scientific paper

10.1103/PhysRevD.74.123523

We argue that a non-thermal leptogenesis occurs spontaneously, without direct couplings of the inflaton with right-handed neutrinos, in a wide class of high-scale inflation models such as the chaotic and hybrid inflation. It is only a finite vacuum expectation value of the inflaton, or more precisely, a linear term in the Kahler potential, that is a prerequisite for the spontaneous non-thermal leptogenesis. To exemplify how it works, we show that a chaotic inflation model in supergravity naturally produces a right amount of baryon asymmetry via the spontaneous non-thermal leptogenesis. We also discuss the gravitino production from the inflaton.

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