Hybrid Inflation in Supergravity without Inflaton Superpotential

Details Hybrid Inflation in Supergravity without Inflaton Superpotential Hybrid Inflation in Supergravity without Inflaton Superpotential

2002-07-22

arxiv.org/abs/hep-ph/0207262v2

Nuovo Cim. B119 (2004) 921-929

Physics

High Energy Physics

High Energy Physics - Phenomenology

Latex, 9 pages

Scientific paper

We propose a new realisation of hybrid inflation in supergravity where the inflaton field does not appear in the superpotential but contributes only through the Kahler potential. The scalar potential derived from an R-invariant superpotential has the same form as that of the Linde's original version. The correct magnitude of the density perturbations amplitude is found without any fine-tuning of the coupling parameter in the superpotential for an acceptable value of the fundamental energy scale of the theory. The eta-problem was also resolved in this model.

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