Search for SUSY in (leptons +) jets + ETmiss final states Original Research Article

We study the observability of the strongly interacting squarks and gluinos in CMS. Classical ETmiss + 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 m0, m12 for 4 sets of model parameters: tan β = 2 or 35 and sign (μ) = ±1 and for fixed value of A0 = 0. The CMS detector response is modelled using CMSJET fast MC code (non-GEANT). The results obtained are presented as 5 σ detection contours in the m0, m12 planes and with optimized selection cuts in various regions of the parameter space. The result of these investigations is that with integrated luminosity L = 105 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.