We study the decay of the inflaton in no-scale supergravity and show that decay due to the gravitational interactions through supergravity effects is highly suppressed relative to the case in minimal supergravity or models with a generic Kähler potential. We also show that decay to gravitinos is suppressed. We demonstrate that decay and sufficient reheating are possible with the introduction of a non-trivial gauge kinetic term. This channel may be dominant in no-scale supergravity, yet yields a reheating temperature which is low enough to avoid the gravitino problem while high enough for big bang nucleosynthesis and baryogenesis.
- Physics of the early universe
ASJC Scopus subject areas
- Astronomy and Astrophysics