Aspects of Hybrid Inflation in Supergravity(Chapter I: Models of the early universe,Cosmology-The Next Generation-)
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概要
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We revisit the F-term hybrid inflation model in supergravity. In particular, we point out that a constant term in the superpotential has significant effects on the inflaton dynamics. It is shown that the hybrid inflation model suffers from several potential problems: tuning of the initial condition, gravitino overproduction and formation of cosmic strings, for both minimal and non-minimal Kahler potentials. These problems can only be avoided in gaugemediated SUSY breaking models where the gravitino is relatively light and the constant term in the superpotential is not important. Implications on the non-thermal leptogenesis scenario are also described.
- 2011-10-31
著者
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TAKAHASHI Fuminobu
Institute for the Physics and Mathematics of the Universe, University of Tokyo
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Takahashi Fuminobu
Institute For Cosmic Ray Research University Of Tokyo
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Yanagida Tsutomu
Institute For The Physics And Mathematics Of The Universe (ipmu) University Of Tokyo:department Of P
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Nakayama Kazunori
Theory Center Kek
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Nakayama Kazunori
Theory Center Institute Of Particle And Nuclear Studies Kek
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Yanagida Tsutomu
Institute For The Physics And Mathematics Of The Universe University Of Tokyo:department Of Physics
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Yanagida Tsutomu
Institute For Cosmic Ray Research University Of Tokyo : Research Center For The Early Universe (resc
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TAKAHASHI Fuminobu
Institute for the Physics and Mathematics of the Universe, The University of Tokyo
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