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Search for the supersymmetric partner of the top quark in pp̅ collisions at √s=1.96  TeV

Author(s)
Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Makhoul, Khaldoun; Paus, Christoph M. E.; Bauer, Gerry P
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Abstract
We present a search for the lightest supersymmetric partner of the top quark in proton-antiproton collisions at a center-of-mass energy √s=1.96  [square root of 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 [fb superscript -1] collected by the Collider Detector at Fermilab 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 [GeV/c superscript 2] are excluded for sneutrino masses around 45  GeV/c2 [GeV/c superscript 2], and sneutrino masses up to 116  GeV/c2 [GeV/c superscript 2] are excluded for stop quark masses around 150  GeV/c2 [GeV/c superscript 2].
Date issued
2010-11
URI
http://hdl.handle.net/1721.1/62848
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Physical Review D
Publisher
American Physical Society
Citation
Aaltonen, T. et al. “Search for the supersymmetric partner of the top quark in pp[over ¯] collisions at sqrt[s]=1.96  TeV.” Physical Review D 82.9 (2010) : n. pag. © 2010 The American Physical Society
Version: Final published version
ISSN
1550-7998
1550-2368

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