Spontaneous nonthermal leptogenesis in high-scale inflation models
Journal Article
·
· Physical Review. D, Particles Fields
- Deutsches Elektronen Synchrotron DESY, Notkestrasse 85, 22607 Hamburg (Germany)
- Department of Physics, University of Tokyo, Tokyo 113-0033 (Japan)
We argue that a nonthermal 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 Kaehler potential, that is a prerequisite for the spontaneous nonthermal 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 nonthermal leptogenesis. We also discuss the gravitino production from the inflaton.
- OSTI ID:
- 20868193
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 74, Issue 12; Other Information: DOI: 10.1103/PhysRevD.74.123523; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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