Search for Pair Production of Supersymmetric Top Quarks in Dilepton Events from pp[over-bar] Collisions at [sqrt]s=1.96 TeV
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Aaltonen-2010-Search for Pair Prod.pdf
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Author(s)
Paus, Christoph M. E.
Choudalakis, Georgios
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Hahn, Kristian Allan
Henderson, C.
Knuteson, Bruce O.
Xie, Si
Bauer, Gerry P
Makhoul, Khaldoun
Alternative Title
Search for Pair Production of Supersymmetric Top Quarks in Dilepton Events from pp̅ Collisions at √s=1.96 TeV
Date Issued
December 2010
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
CDF Collaboration et al. “Search for Pair Production of Supersymmetric Top Quarks in Dilepton Events from pp[over-bar] Collisions at [sqrt]s=1.96 TeV.” Physical Review Letters 104.25 (2010): 251801. © 2010 The American Physical Society.
Version
Final published version
Abstract
We present the results of a search for pair production of the supersymmetric partner of the top quark (the top squark t˜1) decaying to a b quark and a chargino χ˜1± with a subsequent χ˜1± decay into a neutralino χ˜10, lepton ℓ, and neutrino ν. Using a data sample corresponding to 2.7 fb-1 of integrated luminosity of pp̅ collisions at [sqrt]s=1.96 TeV collected by the CDF II detector, we reconstruct the mass of top squark candidate events and fit the observed mass spectrum to a combination of standard model processes and t˜1t˜̅ 1 signal. We find no evidence for t˜1t˜̅ 1 production and set 95% C.L. limits on the masses of the top squark and the neutralino for several values of the chargino mass and the branching ratio B(χ˜1±→χ˜10ℓ±ν).
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.104.251801
