Moduli Evolution in Heterotic Scenarios

Details Moduli Evolution in Heterotic Scenarios Moduli Evolution in Heterotic Scenarios

2000-10-10

arxiv.org/abs/hep-ph/0010102v2

Phys.Lett. B497 (2001) 136-144

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 4 postscript figures

Scientific paper

10.1016/S0370-2693(00)01308-3

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.

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