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arXiv · hep-ph/0207262

Hybrid Inflation in Supergravity without Inflaton Superpotential

H. Boutaleb-J·A. Chafik·A. L. Marrakchi
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Abstract

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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H. Boutaleb-J, A. Chafik, A. L. Marrakchi. 2002-08-19. Hybrid Inflation in Supergravity without Inflaton Superpotential. https://doi.org/10.1393/ncb%2Fi2003-10096-1

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