Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2002-12-20
Phys.Rev. D68 (2003) 024030
Physics
High Energy Physics
High Energy Physics - Theory
18 pages, Latex, 8 eps-figures, typos corrected
Scientific paper
10.1103/PhysRevD.68.024030
We study flop-transitions for M-theory on Calabi-Yau three-folds and their applications to cosmology in the context of the effective five-dimensional supergravity theory. In particular, the additional hypermultiplet which becomes massless at the transition is included in the effective action. We find the potential for this hypermultiplet which includes quadratic and quartic terms as well as additional dependence on the Kahler moduli. By constructing explicit cosmological solutions, it is demonstrated that a flop-transition can indeed by achieved dynamically, as long as the hypermultiplet is set to zero. Once excitations of the hypermultiplet are taken into account we find that the transition is generically not completed but the system is stabilised close to the transition region. Regions of moduli space close to flop-transitions can, therefore, be viewed as preferred by the cosmological evolution.
Brandle Matthias
Lukas Andre
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