Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Volume -, Issue 8, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2013/08/038
Keywords
inflation; physics of the early universe; cosmology of theories beyond the SM
Funding
- JSPS [24740135]
- Inoue Foundation for Science
- World Premier International Center Initiative (WPI Program), MEXT, Japan
- [21111006]
- [23104008]
- [24111702]
- [22244030]
- [21244033]
- [22244021]
- Grants-in-Aid for Scientific Research [21111006, 24740135, 22244030, 24111702] Funding Source: KAKEN
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We present a general polynomial chaotic inflation model in supergravity, for which the predicted spectral index and tensor-to-scalar ratio can lie within the 1 sigma region allowed by the Planck results. Most importantly, the predicted tensor-to-scalar ratio is large enough to be probed in the on-going and future B-mode experiments. We study the inflaton dynamics and the subsequent reheating process in a couple of specific examples. The non-thermal gravitino production from the inflaton decay can be suppressed in a case with a discrete Z(2) symmetry. We find that the reheating temperature can be naturally as high as O(10(9-10)) GeV, sufficient for baryon asymmetry generation through (non-)thermal leptogenesis.
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