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Title: Polynomial chaotic inflation in supergravity

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 1σ 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{sub 2} symmetry. We find that the reheating temperature can be naturally as high as O(10{sup 9−10}) GeV, sufficient for baryon asymmetry generation through (non-)thermal leptogenesis.
Authors:
 [1] ;  [2] ;  [3]
  1. Department of Physics, University of Tokyo, Tokyo 113-0033 (Japan)
  2. Department of Physics, Tohoku University, Sendai 980-8578 (Japan)
  3. Kavli Institute for the Physics and Mathematics of the Universe (WPI), TODIAS, University of Tokyo, Kashiwa 277-8583 (Japan)
Publication Date:
OSTI Identifier:
22282730
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2013; Journal Issue: 08; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ASYMMETRY; BARYONS; CHAOS THEORY; GEV RANGE; GRAVITINOS; INFLATIONARY UNIVERSE; INFLATONS; PARTICLE PRODUCTION; POLYNOMIALS; SCALARS; SUPERGRAVITY; SYMMETRY; TENSORS