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

Authors:Aaltonen, T.
Cabrera, Susana
Cuenca Almenar, Cristóbal
Álvarez González, B.
Casal, Bruno
Cuevas, Javier
Gómez, G.
Rodrigo, Teresa
Ruiz Jimeno, Alberto
Scodellaro, Luca
Vila, Iván
Vilar, Rocío
Issue Date:2-Nov-2010
Publisher:American Physical Society
Citation:Physical Review D 82(9): 092001 (2010)
Abstract:We present a search for the lightest supersymmetric partner of the top quark in proton-antiproton collisions at a center-of-mass energy 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 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/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).
Description:16 páginas, 11 figuras, 7 tablas.-- PACS numbers: 14.80.Ly, 13.85.Rm, 12.60.Jv.-- CDF Collaboration: et al.
Publisher version (URL):http://dx.doi.org/10.1103/PhysRevD.82.092001
URI:http://hdl.handle.net/10261/32940
ISSN:1550-7998
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