Search for Z[superscript ′] resonances decaying to tt̅ in dilepton+jets final states in pp collisions at √s=7 TeV
Name
Chatrchyan-2013-Search for Z ' resonances decaying to.pdf
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Author(s)
Apyan, Aram
Bendavid, Joshua L.
Busza, Wit
Butz, Erik M.
Cali, Ivan Amos
Chan, M.
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Kim, Y.
Klute, Markus
Date Issued
April 2013
Journal
Physical Review D
Publisher
American Physical Society
Citation
Chatrchyan, S., V. Khachatryan, A. M. Sirunyan, A. Tumasyan, W. Adam, E. Aguilo, T. Bergauer, et al. “Search for Z^{′} resonances decaying to tt[over ¯] in dilepton+jets final states in pp collisions at sqrt[s]=7 TeV.” Physical Review D 87, no. 7 (April 2013). © 2013 CERN, for the CMS Collaboration
Version
Final published version
Abstract
A search for resonances decaying to top quark-antiquark pairs is performed using a dilepton+jets data sample recorded by the CMS experiment at the LHC in pp collisions at √s=7 TeV corresponding to an integrated luminosity of 5.0 fb[superscript -1]. No significant deviations from the standard model background are observed. Upper limits are presented for the production cross section times branching fraction of top quark-antiquark resonances for masses from 750 to 3000 GeV. In particular, the existence of a leptophobic topcolor particle Z[superscript ′] is excluded at the 95% confidence level for resonance masses M[subscript Z]′<1.3 TeV for Γ[subscript Z]′=0.012M[subscript Z]′, and M<1.9 TeV for Γ[subscript Z]′=0.10M[subscript Z]′.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Massachusetts Institute of Technology. School of Science
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Creative Commons Attribution 3.0
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.87.072002
