Search For The Supersymmetric Partner Of The Top Quark In Ppbar Collisions At Sqrts
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Search for the Supersymmetric Partner of the Top Quark in Ppbar Collisions at Sqrt(s)
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Total Pages | : 17 |
Release | : 2010 |
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We present a search for the lightest supersymmetric partner of the top quark in proton-antiproton collisions at a center-of-mass energy (square root)s = 1.96 TeV. This search was conducted within the framework of the R-parity conserving minimal supersymmetric extension of the standard model, assuming the stop decays dominantly to a lepton, a sneutrino, and a bottom quark. We searched for events with two oppositely-charged leptons, at least one jet, and missing transverse energy in a data sample corresponding to an integrated luminosity of 1 fb−1 collected by the CDF experiment. No significant evidence of a stop quark signal was found. Exclusion limits at 95% confidence level in the stop quark versus sneutrino mass plane are set. Stop quark masses up to 180 GeV/c2 are excluded for sneutrino masses around 45 GeV/c2, and sneutrino masses up to 116 GeV/c2 are excluded for stop quark masses around 150 GeV/c2.
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