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Exclusion of an Exotic Top Quark with-4/3 Electric Charge Using Soft Lepton Tagging

Author(s)
Paus, Christoph M. E.; Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Bauer, Gerry P; Makhoul, Khaldoun
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Abstract
We present a measurement of the electric charge of the top quark using pp[over-bar] collisions corresponding to an integrated luminosity of 2.7  fb[superscript -1] at the CDF II detector. We reconstruct tt[over-bar] events in the lepton+jets final state. We use soft lepton taggers to determine the flavor of the b jets, which we use to reconstruct the top quark’s electric charge and exclude an exotic top quark with -4/3 charge at 95% confidence level. This is the strongest exclusion of the exotic charge scenario and the first to use soft leptons for this purpose.
Date issued
2010-08
URI
http://hdl.handle.net/1721.1/60385
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
CDF Collaboration et al. “Exclusion of an Exotic Top Quark with -4/3 Electric Charge Using Soft Lepton Tagging.” Physical Review Letters 105.10 (2010): 101801. © 2010 The American Physical Society.
Version: Final published version
ISSN
0031-9007

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