Constraints from Inflation and Reheating on Superpartner Masses

Details Constraints from Inflation and Reheating on Superpartner Masses Constraints from Inflation and Reheating on Superpartner Masses

1996-11-14

arxiv.org/abs/hep-ph/9611325v2

Phys.Lett.B396:50-57,1997

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages in LaTeX + 2 postscript figures, uses epsf.sty; revised version, effect of Yukawa couplings added, figure modified, o

Scientific paper

10.1016/S0370-2693(97)00035-X

Flat directions in the Minimal Supersymmetric Standard Model (MSSM) can become unstable due to radiative corrections, and the global minimum of the (zero temperature) potential can lie at large values of the squark and/or slepton fields. Here we show that, in inflationary models of early cosmology, the universe is very likely to be in the domain of attraction of this global minimum at the end of inflation. While the minimum at the origin of field space is global at sufficiently high temperatures, depending on details of the model, the universe may be trapped in the non-zero minimum until it becomes the global minimum at low temperatures. Parameter values leading to this scenario are therefore ruled out.

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