Natural Hybrid Inflation Model with Large Non-Gaussianity

Abstract

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.

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

References in corpus (6)

• Non-Gaussianities in two-field inflation
• Multiple field inflation
• Large non-Gaussianity from multi-brid inflation
• Hilltop Non-Gaussianity
• Waterfall field in hybrid inflation and curvature perturbation
• No Large Scale Curvature Perturbations during Waterfall of Hybrid Inflation

Cited by in corpus (6)

• Evading the Lyth Bound in Hybrid Natural Inflation
• Primordial curvature perturbation during and at the end of multi-field inflation
• Modulated reheating by curvaton
• Large tensor spectrum of BICEP2 in the natural SUSY hybrid model
• Primordial gravitational wave of BICEP2 from dynamical double hybrid inflation
• Generically large nongaussianity in small multifield inflation