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Search for Top-Quark Partners with Charge 5/3 in the Same-Sign Dilepton Final State

Author(s)
Apyan, Aram; Barbieri, Riccardo; Bauer, Gerry P.; Busza, Wit; Cali, Ivan Amos; Chan, M.; Di Matteo, Leonardo; Dutta, V.; Goncharov, Maxim; Gulhan, Doga Can; Klute, Markus; Lai, Yue Shi; Lee, Y.-J.; Levin, A.; Luckey, P. David, Jr.; Ma, Teng; Paus, Christoph M. E.; Ralph, Duncan Kelley; Roland, Christof E.; Roland, Gunther M.; Stephans, George S. F.; Stockli, Fabian; Sumorok, Konstanty C.; Velicanu, Dragos Alexandru; Veverka, Jan; Wyslouch, Boleslaw; Yang, M.; Yoon, A. S.; Zanetti, Marco; Zhukova, Victoria; Gomez-Ceballos, Guillelmo; ... Show more Show less
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Abstract
A search for the production of heavy partners of the top quark with charge 5/3 is performed in events with a pair of same-sign leptons. The data sample corresponds to an integrated luminosity of 19.5  fb[superscript −1] and was collected at √s = 8  TeV by the CMS experiment. No significant excess is observed in the data above the expected background, and the existence of top-quark partners with masses below 800 GeV is excluded at a 95% confidence level, assuming they decay exclusively to tW. This is the first limit on these particles from the LHC, and it is significantly more restrictive than previous limits.
Date issued
2014-04
URI
http://hdl.handle.net/1721.1/88726
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science; Massachusetts Institute of Technology. School of Science
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Chatrchyan, S., V. Khachatryan, A. M. Sirunyan, A. Tumasyan, W. Adam, T. Bergauer, M. Dragicevic, et al. “Search for Top-Quark Partners with Charge 5/3 in the Same-Sign Dilepton Final State.” Physical Review Letters 112, no. 17 (April 2014). © 2014 CERN, for the CMS Collaboration
Version: Final published version
ISSN
0031-9007
1079-7114

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