Heavy gravitino in hybrid inflation
High Energy Physics - Phenomenology
2013-06-26 v2 Cosmology and Nongalactic Astrophysics
Abstract
It is known that supersymmetric hybrid inflation model may require severe tunings on the initial condition for large gravitino mass of order 100 - 1000 TeV due to the constant term in the superpotential. We propose a modified hybrid inflation model, where the constant term is suppressed during inflation and generated after inflation by replacing a constant term with dynamical field. In this modified model, successful inflation consistent with large gravitino mass takes place without severe tunings on the initial condition. Constraint from cosmic strings is also relaxed.
Keywords
Cite
@article{arxiv.1301.6281,
title = {Heavy gravitino in hybrid inflation},
author = {Masahiro Kawasaki and Naoya Kitajima and Kazunori Nakayama and Tsutomu T. Yanagida},
journal= {arXiv preprint arXiv:1301.6281},
year = {2013}
}
Comments
17 pages, 6 figures; version accepted for publication in JCAP