Anupam Mazumdar, Seshadri Nadathur, Philip Stephens
It is well known that large Hubble-induced supergravity corrections to the
inflaton field can ruin the flatness of the potential, thus creating a tension
between slow-roll inflation and supergravity. In this paper we show that it is
possible to obtain a {\it cosmologically flat} direction, embedded within the
MSSM (Minimal Supersymmetric Standard Model), in spite of very large
super-Hubble corrections. As an illustration, we show that a flat direction
which is lifted by an $n=6$ operator matches the current cosmic microwave
background data for a wide range of the Hubble parameter, $10^{5} {\rm
GeV}\lesssim H_{inf}\lesssim 10^{8.5}$ GeV. Our results are generic and can be
applicable to any $F$-term inflationary models.
View original:
http://arxiv.org/abs/1105.0430
No comments:
Post a Comment