Search for the supersymmetric partner of the top quark in pp collisions at {radical}(s)=1.96 TeV

Journal Article · Mon Nov 01 00:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.82.092001· OSTI ID:21503759

Aaltonen, T; Brucken, E; Devoto, F; Mehtala, P; Orava, R ^[1]; Alvarez Gonzalez, B; Casal, B; Cuevas, J; Gomez, G; Palencia, E; Rodrigo, T; Ruiz, A; Scodellaro, L; Vila, I; Vilar, R ^[2]; Amerio, S; Dorigo, T; Gresele, A; Lazzizzera, I ^[3]; Amidei, D ^[4]

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1. Division of High Energy Physics, Department of Physics, University of Helsinki and Helsinki Institute of Physics, FIN-00014, Helsinki (Finland)
2. Instituto de Fisica de Cantabria, CSIC-University of Cantabria, 39005 Santander (Spain)
3. Istituto Nazionale di Fisica Nucleare, Sezione di Padova-Trento, I-35131 Padova (Italy)
4. University of Michigan, Ann Arbor, Michigan 48109 (United States)

We present a search for the lightest supersymmetric partner of the top quark in proton-antiproton collisions at a center-of-mass energy {radical}(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{sup -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{sup 2} are excluded for sneutrino masses around 45 GeV/c{sup 2}, and sneutrino masses up to 116 GeV/c{sup 2} are excluded for stop quark masses around 150 GeV/c{sup 2}.

• OSTI ID: 21503759
• Journal Information: Physical Review. D, Particles Fields, Vol. 82, Issue 9; Other Information: DOI: 10.1103/PhysRevD.82.092001; (c) 2010 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
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LEPTONS
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PARITY
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