Search for supersymmetry in hadronic final states using M_T2 in pp collisions at sqrt(s) = 7 TeV

A search for supersymmetry or other new physics resulting in similar nal states is presented using a data sample of 4.73 fb-1 of pp collisions collected at sqrt(s) = 7TeV with the CMS detector at the LHC. Fully hadronic final states are selected based on the variable M_T2, an extension of the transverse mass in events with two invisible particles. Two complementary studies are performed. The first targets the region of parameter space with medium to high squark and gluino masses, in which the signal can be separated from the standard model backgrounds by a tight requirement on M_T2. The second is optimized to be sensitive to events with a light gluino and heavy squarks. In this case, the M_T2 requirement is relaxed, but a higher jet multiplicity and at least one b-tagged jet are required. No signicant excess of events over the standard model expectations is observed. Exclusion limits are derived for the parameter space of the constrained minimal supersymmetric extension of the standard model, as well as on a variety of simplified model spectra.