NEW SIGNALS FOR GLUINOS AND SQUARKS OF SUPERGRAVITY AT THE FERMILAB TEVATRON COLLIDER

Within the supergravity framework, sleptons are expected to be conside rably lighter than squarks if gluinos and squarks are approximately de generate. This can lead to a significant enhancement in leptonic branc hing ratio for neutralinos, and, sometimes, charginos. Using ISAJET 7. 0 and/or ISASUSY 1.0, we evaluate the multilepton signals from cascade decays of gluinos and squarks produced at the Fermilab Tevatron ppBAR collider assuming squark and slepton masses are related as in supergr avity models. We find observable cross sections for spectacular event topologies: m lepton + n jet + E(T)BAR events (m less-than-or-equal-to 4, n greater-than-or-equal-to 2) and same-sign dilepton + E(T)BAR eve nts and show that the SM backgrounds to the isolated trilepton, four-l epton, and same-sign dilepton signals are very small. These signals ca n extend the mass reach of the Tevatron experiments to m(g) approximat ely 300 GeV if m(g) approximately m(q) and approximately (1000) pb-1 o f data are collected,