Aspects of Hybrid Inflation in Supergravity

作者：Nakayama Kazunori^*; Takahashi Fuminobu; Yanagida Tsutomu T

来源：Progress of Theoretical Physics - Supplement, 2011, 190(190): 42-49.

DOI：10.1143/ptps.190.42

We revisit the F-term hybrid inflation model in supergravity. In particular, we point out that a constant term in the superpotential has significant effects on the inflaton dynamics. It is shown that the hybrid inflation model suffers from several potential problems: tuning of the initial condition, gravitino overproduction and formation of cosmic strings, for both minimal and non-minimal Kahler potentials. These problems can only be avoided in gauge-mediated SUSY breaking models where the gravitino is relatively light and the constant term in the superpotential is not important. Implications on the non-thermal leptogenesis scenario are also described.

• 出版日期2011