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General Analysis of Inflation in the Jordan frame Supergravity · Around

2010

General Analysis of Inflation in the Jordan frame Supergravity

Nakayama, Kazunori, Takahashi, Fuminobu

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We study various inflation models in the Jordan frame supergravity with a logarithmic Kahler potential.

We find that, in a class of inflation models containing an additional singlet in the superpotential, three types of inflation can be realized: the Higgs-type inflation, power-law inflation, and chaotic inflation with/without a running kinetic term.
The former two are possible if the holomorphic function dominates over the non-holomorphic one in the frame function, while the chaotic inflation occurs when both are comparable.
Interestingly, the fractional-power potential can be realized by the running kinetic term.

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