A Next-to-Minimal Supersymmetric Model of Hybrid Inflation
arXiv:hep-ph/9709502 · doi:10.1016/S0370-2693(98)00124-5
Abstract
We propose a model of inflation based on a simple variant of the NMSSM, called NMSSM, where the additional singlet plays the role of the inflaton in hybrid (or inverted hybrid) type models. As in the original NMSSM, the NMSSM solves the problem of the MSSM via the VEV of a gauge singlet , but unlike the NMSSM does not suffer from domain wall problems since the offending symmetry is replaced by an approximate Peccei-Quinn symmetry which also solves the strong CP problem, and leads to an invisible axion with interesting cosmological consequences. The PQ symmetry may arise from a superstring model with an exact discrete symmetry after compactification. The model predicts a spectral index to one part in .
17 pages, Latex; note added, accepted for Phys. Lett. B
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