Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2008-02-07
JCAP0807:021,2008
Physics
High Energy Physics
High Energy Physics - Theory
28 pages, 8 figures, comments and references added, minor change in notation, version to be published
Scientific paper
10.1088/1475-7516/2008/07/021
The relation between the Hubble constant and the scale of supersymmetry breaking is investigated in models of inflation dominated by a string modulus. Usually in this kind of models the gravitino mass is of the same order of magnitude as the Hubble constant which is not desirable from the phenomenological point of view. It is shown that slow-roll saddle point inflation may be compatible with a low scale of supersymmetry breaking only if some corrections to the lowest order Kahler potential are taken into account. However, choosing an appropriate Kahler potential is not enough. There are also conditions for the superpotential, and e.g. the popular racetrack superpotential turns out to be not suitable. A model is proposed in which slow-roll inflation and a light gravitino are compatible. It is based on a superpotential with a triple gaugino condensation and the Kahler potential with the leading string corrections. The problem of fine tuning and experimental constraints are discussed for that model.
Badziak Marcin
Olechowski Marek
No associations
LandOfFree
Volume modulus inflation and a low scale of SUSY breaking does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Volume modulus inflation and a low scale of SUSY breaking, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Volume modulus inflation and a low scale of SUSY breaking will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-365192