Moduli Evolution in Heterotic Scenarios

Abstract

We discuss several aspects of the cosmological evolution of moduli fields in heterotic string/M-theory scenarios. In particular we study the equations of motion of both the dilaton and overall modulus of these theories in the presence of an expanding Universe and under different assumptions. First we analyse the impact of their couplings to matter fields, which turns out to be negligible in the string and M-theory scenarios. Then we examine in detail the possibility of scaling in M-theory, i.e. how the moduli would evolve naturally to their minima instead of rolling past them in the presence of a dominating background. In this case we find interesting and positive results, and we compare them to the analogous situation in the heterotic string.

12 pages, 4 postscript figures

References in corpus (4)

• Cosmology and the Fate of Dilatation Symmetry
• A Cosmological Mechanism for Stabilizing Moduli
• Moduli as Inflatons in Heterotic M-theory
• Scales of Gaugino Condensation and Supersymmetry Breaking in Nonstandard M-Theory Embeddings

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