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.

17 pages, 11 figures. Revised with better quality of figures, minor change to references, To be published in Phys. Rev. D

References in corpus (22)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• New Generation of Parton Distributions with Uncertainties from Global QCD Analysis
• An update on vector boson pair production at hadron colliders
• Inclusive Jet Production, Parton Distributions, and the Search for New Physics
• Stop Production at Hadron Colliders
• Determination of the Jet Energy Scale at the Collider Detector at Fermilab
• The t-tbar cross-section at 1.8 and 1.96 TeV: a study of the systematics due to parton densities and scale dependence
• Measurements of Inclusive W and Z Cross Sections in p-pbar Collisions at sqrt{s} =1.96 TeV
• QCD Corrections to Hadronic $W\gamma$ Production with Non-standard $WW\gamma$ Couplings
• Search for Scalar Top and Scalar Bottom Quarks in $p\bar{p}$ collisions at $\sqrt{s}=1.8$ TeV
• Measurement of the Cross Section for $t\bar{t}$ Production in $p\bar{p}$ Collisions using the Kinematics of Lepton+Jets Events
• Search for the lightest scalar top quark in events with two leptons in ppbar collisions at sqrt(s)=1.96 TeV
• Search for Scalar Top Quark Production in p-pbar Collisions at 1.8 TeV
• Searches for Direct Pair Production of Supersymmetric Top and Supersymmetric Bottom Quarks in p-pbar Collisions at sqrt(s)=1.96 TeV
• Search for the pair production of scalar top quarks in the acoplanar charm jet topology in p pbar collisions at sqrt(s)=1.96 TeV
• Search for the Supersymmetric Partner of the Top Quark in Dilepton Events from p-pbar Collisions at 1.8 TeV
• Search for the lightest scalar top quark in events with two leptons in p-pbar collisions at sqrt(s) = 1.96 TeV
• A Search forthe Scalar Top Quark in $p\bar{p}$ Collisions at $\sqrt{s}=$ 1.8 TeV
• Search for Pair Production of Light Scalar Top Quarks in p-pbar Collisions at sqrt{s}=1.8 TeV
• Search for new physics in the mu+mu+e/mu+met channel with a low-pT lepton threshold at the Collider Detector at Fermilab

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