Search for excited quarks in the γ + jet final state in proton-proton collisions at √s = 8 TeV
Name
Khachatryan-2014-Search for excited q.pdf
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714.12 KB
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Author(s)
Apyan, Aram
Busza, Wit
Cali, Ivan Amos
Chan, M.
Di Matteo, Leonardo
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Gulhan, Doga Can
Klute, Markus
Lai, Yue Shi
Date Issued
September 2014
Journal
Physics Letters B
Publisher
Elsevier
Citation
V. Khachatryan, et al. “Search for Excited Quarks in the γ + Jet Final State in Proton-proton Collisions at √s = 8 TeV.” Physics Letters B 738 (November 2014): 274–293.
Version
Final published version
Abstract
A search for excited quarks decaying into the γ+jet final state is presented. The analysis is based on data corresponding to an integrated luminosity of 19.7 fb[superscript −1] collected by the CMS experiment in proton–proton collisions at √s = 8 TeV at the LHC. Events with photons and jets with high transverse momenta are selected and the γ+jetγ+jet invariant mass distribution is studied to search for a resonance peak. The 95% confidence level upper limits on the product of cross section and branching fraction are evaluated as a function of the excited quark mass. Limits on excited quarks are presented as a function of their mass and coupling strength; masses below 3.5 TeV are excluded at 95% confidence level for unit couplings to their standard model partners.
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
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DOI of Published Version
https://doi.org/10.1016/j.physletb.2014.09.048
