Natural Hybrid Inflation Model with Large Non-Gaussianity

Details Natural Hybrid Inflation Model with Large Non-Gaussianity Natural Hybrid Inflation Model with Large Non-Gaussianity

2011-09-20

arxiv.org/abs/1109.4245v2

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

19 pages, 4 figures and 1 Table, published version in PLB

Scientific paper

We propose an inflationary model ("natural hybrid model"), which combines the supersymmetric hybrid model and the natural inflation model to achieve the spectral index of 0.96, and the axion decay constant smaller than the Planck scale, f<< M_P. By introducing both U(1)_R and a shift symmetry and employing the minimal Kahler potential, the eta-problem can be still avoided. The two inflaton fields in this model can admit large non-Gaussianity.

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