Search for SUSY in (leptons plus) jets plus ETmiss 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 additional multilepton signatures (0 leptons, 1 lepton, 2 leptons of the same sign, 2 leptons of the opposite sign and 3 leptons) are investigated. The detection of these sparticles relies on the observation of an excess of events over Standard Model background expectations. The study is made in the framework of a minimal SU(5) mSUGRA model as a function of m(0), m(1/2) for 4 sets of model parameters: tan beta = 2 or 35 and sign(mu) = +/-1 and for fixed value of A(0) = 0. The CMS detector response is modelled using CMSJET fast MC code (non-GEANT). The results obtained an presented as 5 sigma detection contours in the m(0), m(1/2) planes and with optimized selection cuts in various regions of the parameter space. The result of these investigations 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 parameter space according to neutralino relic density expectations. (C) 1999 Elsevier Science B.V.