Spontaneous Non-thermal Leptogenesis in High-scale Inflation Models
arXiv:hep-ph/0611055 · doi:10.1103/PhysRevD.74.123523
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.
18 pages, 1 figure. v2: references added, accepted for publication in PRD
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- Inflaton Decay in Supergravity
- Running Kinetic Inflation
- Phenomenological Aspects of Horava-Lifshitz Cosmology
- Anomaly-Induced Inflaton Decay and Gravitino-Overproduction Problem
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