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We explore the implications of 7 TeV LHC searches for a scenario in which oneof the stops is the next-to lightest supersymmetric particle (NLSP). The NLSPstop (\tilde{t}_1) is assumed to decay exclusively into neutralino and charmquark. We consider processes where the stops are pair produced together with ahard QCD jet. We also consider stop quarks from gluino decays, \tilde{g}\tot\tilde{t}_1^\ast+\bar{t}\tilde{t}_1. We show that the monojet ATLAS and CMSsearches corresponding to 1 fb^{-1} of integrated luminosity are sensitive tostop masses of up to 160 GeV, with the 20% neutralino-stop coannihilationregion essentially ruled out for M_{\tilde{t}_1}\lesssim 140 GeV. The regionM_{\tilde{t}_1}\lesssim 130 GeV is excluded with even relatively larger massdifference, M_{\tilde{t}_1}-M_{\tilde{\chi}_1^0}\sim 40 GeV, by the multi-jetssearch. The b-jet and same-sign dilepton searches are sensitive to a heaviergluino because they only pick up gluino pair production events followed by topquarks decaying into b-jets and same-sign dileptons, respectively. We find thatthe LHC data places a lower limit on the gluino mass in this scenario of about600 GeV (700 GeV) from b-jets (same-sign dileptons) searches.

Impact of LHC Searches on NLSP Top Squark and Gluino Mass