Moduli decay in the hot early Universe

Details Moduli decay in the hot early Universe Moduli decay in the hot early Universe

2006-05-02

arxiv.org/abs/hep-ph/0605030v2

JCAP 0606 (2006) 027

Physics

High Energy Physics

High Energy Physics - Phenomenology

Numerical error in the final result for the damping rate corrected, conclusions of the paper are not affected

Scientific paper

10.1088/1475-7516/2006/06/027

We consider moduli fields interacting with thermalized relativistic matter. We determine the temperature dependence of their damping rate and find it is dominated by thermal effects in the high temperature regime, i.e. for temperatures larger than their mass. For a simple scalar model the damping rate is expressed through the known matter bulk viscosity. The high temperature damping rate is always smaller than the Hubble rate, so that thermal effects are not sufficient for solving the cosmological moduli problem.

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