PREDICTIONS IN SU(5) SUPERGRAVITY GRAND UNIFICATION WITH PROTON STABILITY AND RELIC DENSITY CONSTRAINTS

It is shown that in the physically interesting domain of the parameter space of SU(5) supergravity grand unified theory. the Higgs-boson and Z poles dominate the annihilation of the lightest supersymmetric part icle. Here the naive analyses on thermal averaging breaks down and for mulas are derived which give a rigorous treatment over the poles. Thes e results are then used to show that there exist significant domains i n the parameter space where the constraints of proton stability and co smology are simultaneously satisfied. New upper limits on light partic le masses are obtained.