Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2008-12-18
JHEP 0904:010,2009
Physics
High Energy Physics
High Energy Physics - Theory
LaTeX, 22 pages plus appendix; v2: references added, minor changes
Scientific paper
10.1088/1126-6708/2009/04/010
We study cosmological properties of type IIA compactifications on orientifolds of SU(3)-structure manifolds with non-vanishing geometric flux. These compactifications give rise to effective 4D N=1 supergravity theories that do not fall under some recently-proven no-go theorems against de Sitter vacua and slow-roll inflation. Focusing on a well-understood class of models based on coset spaces, however, we can use a refined no-go theorem that rules out de Sitter vacua and slow-roll inflation in all but one case. The refined no-go theorem uses the dilaton and a specific linear combination of the Kaehler moduli, which is different from the overall volume modulus. It puts a lower bound on the first slow-roll parameter: epsilon>=2. The only case not ruled out is the manifold SU(2)x SU(2), for which we indeed find critical points with epsilon numerically zero. However, all the points we could find have a tachyon corresponding to an eta-parameter eta<= -2.4.
Caviezel Claudio
Koerber Paul
Kors Simon
Lust Dieter
Wrase Timm
No associations
LandOfFree
On the Cosmology of Type IIA Compactifications on SU(3)-structure Manifolds 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 On the Cosmology of Type IIA Compactifications on SU(3)-structure Manifolds, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the Cosmology of Type IIA Compactifications on SU(3)-structure Manifolds will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-726362