# Search for the supersymmetric partner of the top quark in ppbar collisions at sqrt(s) = 1.96 TeV

Abstract : We present a search for the lightest supersymmetric partner of the top quark in proton-antiproton collisions at a center-of-mass energy sqrt(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 1fb^-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/c^2 are excluded for sneutrino masses around 45 GeV/c^2, and sneutrino masses up to 116 GeV/c^2 are excluded for stop quark masses around 150 GeV/c^2.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00523034
Contributor : Swarna Bassava <>
Submitted on : Monday, October 4, 2010 - 11:59:10 AM
Last modification on : Saturday, December 12, 2020 - 3:15:59 AM

### Citation

T. Aaltonen, B. Alvarez Gonzalez, S. Amerio, D. Amidei, A. Anastassov, et al.. Search for the supersymmetric partner of the top quark in ppbar collisions at sqrt(s) = 1.96 TeV. Physical Review D, American Physical Society, 2010, 82, pp.09001. ⟨10.1103/PhysRevD.82.092001⟩. ⟨in2p3-00523034⟩

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