Moduli Stabilization and Cosmology of Type IIB on SU(2)-Structure Orientifolds

Details Moduli Stabilization and Cosmology of Type IIB on SU(2)-Structure Orientifolds Moduli Stabilization and Cosmology of Type IIB on SU(2)-Structure Orientifolds

2009-12-17

arxiv.org/abs/0912.3287v2

JHEP 1004:011,2010

Physics

High Energy Physics

High Energy Physics - Theory

35 pages + appendices, LaTeX2e; v2: numerical dS extremum added, typos corrected, references added

Scientific paper

10.1007/JHEP04(2010)011

We consider type IIB flux compactifications on six-dimensional SU(2)-structure manifolds with O5- and O7-planes. These six-dimensional spaces allow not only for F_3 and H_3 fluxes but also for F_1 and F_5 fluxes. We derive the four-dimensional N=1 scalar potential for such compactifications and present one explicit example of a fully stabilized AdS vacuum with large volume and small string coupling. We then discuss cosmological aspects of these compactifications and derive several no-go theorems that forbid dS vacua and slow-roll inflation under certain conditions. We also study concrete examples of cosets and twisted tori and find that our no-go theorems forbid dS vacua and slow-roll inflation in all but one of them. For the latter we find a dS critical point with \epsilon numerically zero. However, the point has two tachyons and eta-parameter \eta \approx -3.1.

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