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General Single Field Inflation with Large Positive Non-Gaussianity · Around

2007

General Single Field Inflation with Large Positive Non-Gaussianity

Li, Miao, Wang, Tower, Wang, Yi

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Recent analysis of the WMAP three year data suggests $f_{NL}^{local}\simeq86.8$ in the WMAP convention.

It is necessary to make sure whether general single field inflation can produce a large positive $f_{NL}$ before turning to other scenarios.
We give some examples to generate a large positive $f_{NL}^{equil}$ in general single field inflation.
Our models are different from ghost inflation.

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