TESTING SUPERGRAVITY GRAND UNIFICATION AT FUTURE ACCELERATOR AND UNDERGROUND EXPERIMENTS

The full parameter space of supergravity grand unified theory with SU( 5)-type p--><(nu)over bar>K proton decay is analyzed using renormaliza tion-group-induced electroweak symmetry breaking under the restriction s that the universal scalar mass m(0) and gluino mass are less than or equal to 1 TeV (no extreme fine tuning) and the Higgs triplet mass ob eys M(H3)/M(G)<10. Future proton decay experiments at SuperKamiokande or ICARUS can reach a sensitivity for the <(nu)over bar>K mode of (2-5 ) X 10(33) yr allowing a number of predictions concerning the SUSY mas s spectrum. Thus either the p--><(nu)over bar>K decay mode will be see n at these experiments or a chargino of mass m(W) <100 GeV will exist and hence be observable at CERN LEP2. Further, if (p--><(nu)over bar>K )>1.5 X 10(33) yr, then either the light Higgs boson has mass m(h) les s than or equal to 95 GeV or m(W) less than or equal to 100 GeV, i.e., either the light Higgs boson or the light chargino (or both) would be observable at LEP2. Thus, the combination of future accelerator and f uture underground experiments allow for strong experimental tests of t his theory.