Search for dilepton signatures from minimal low-energy supergravity in pp̅ collisions at √s=1.8 TeV

Abstract

We report on a search for supersymmetry using the D∅ detector. The 1994-1996 data sample of √s=1.8 TeV pp̅ collisions was analyzed for events containing two leptons (e or μ), two or more jets, and missing transverse energy. Assuming the minimal supergravity model, with A₀=0 and μ<0, various thresholds were employed to optimize the search. No events were found beyond expectation from the background. We set a lower limit at the 95% C.L. of 255 GeV/c² for equal mass squarks and gluinos for tanβ=2, and present exclusion contours in the (m₀,m_½) plane for tanβ=2-6.