Search for SUSY in (leptons plus) jets plus E-T(miss) final states

We study the observability of the strongly interacting squarks and gluinos in CMS. Classical E-T(miss) + jets final state as well as a number of addit ional multilepton signatures (0 leptons, 1 lepton, 2 leptons of the same si gn, 2 leptons of the opposite sign and 3 leptons) are investigated. The det ection of these sparticles relies on the observation of an excess of events over Standard Model background expectations. The study is made in the fram ework of a minimal SU(5) mSUGRA model as a function of m(0), m(1/2) for 4 s ets of model parameters: tan beta = 2 or 35 and sign(mu) = +/-1 and for fix ed value of A(0) = 0. The CMS detector response is modelled using CMSJET fa st MC code (non-GEANT). The results obtained an presented as 5 sigma detect ion contours in the m(0), m(1/2) planes and with optimized selection cuts i n various regions of the parameter space. The result of these investigation s is that with integrated luminosity L = 10(5) pb(-1) the squark and gluino mass reach is about 2.5 TeV and covers most of the interesting parts of pa rameter space according to neutralino relic density expectations. (C) 1999 Elsevier Science B.V.