A Next-to-Minimal model of Hybrid Inflation in Effective Supergravity Theories

Details A Next-to-Minimal model of Hybrid Inflation in Effective Supergravity Theories A Next-to-Minimal model of Hybrid Inflation in Effective Supergravity Theories

1999-02-26

arxiv.org/abs/hep-ph/9902477v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, Latex, Talk given at Cosmo-98, Nov 1998

Scientific paper

10.1063/1.59424

We propose a model of inflation based on a simple variant of the NMSSM, called $\phi$NMSSM where the additional singlet $\phi$ plays the role of the inflaton in hybrid (or inverted hybrid) type models. The $\phi$NMSSM solves the $\mu$ problem of the MSSM via the vacuum expectation value of the gauge singlet N, but also solves the strong CP problem through an approximate Peccei-Quinn symmetry. The potential energy which drives inflation originates from the F-term of the effective supergravity theory which result from a generic string theory. In the class of models considered the inflaton is protected from receiving mass during inflation by a Heisenberg symmetry, avoiding the $\eta$ problem.

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