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Spontaneous Non-thermal Leptogenesis in High-scale Inflation Models

Motoi Endo·Fuminobu Takahashi·T. T. Yanagida
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Abstract

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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Motoi Endo, Fuminobu Takahashi, T. T. Yanagida. 2006-12-12. Spontaneous Non-thermal Leptogenesis in High-scale Inflation Models. https://doi.org/10.1103/physrevd.74.123523

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