Predictions in SU(5) Supergravity Grand Unification with Proton Stability and Relic Density Constraints

Abstract

It is shown that in the physically interesting domain of the parameter space of SU(5) supergravity GUT, the Higgs and the Z poles dominate the LSP annihilation. Here the naive analyses on thermal averaging breaks down and formulae are derived which give a rigorous treatment over the poles. These results are then used to show that there exist significant domains in the parameter space where the constraints of proton stability and cosmology are simultaneously satisfied. New upper limits on light particle masses are obtained.

(An error in the reheating factor is corrected, strengthening the conclusions, i.e. the region in parameter space where the relic density constraints are satisfied is enlarged.)

References in corpus (2)

• The Neutralino Relic Density in Minimal N=1 Supergravity
• Cosmological Constraints and SU(5) Supergravity Grand Unification

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