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Search for excited quarks in the photon+jet final state in proton-proton collisions at sqrt(s) = 8 TeV

Abstract : A search for excited quarks decaying into the photon+jet final state is presented. The analysis is based on data corresponding to an integrated luminosity of 19.7 inverse femtobarns collected by the CMS experiment in proton-proton collisions at sqrt(s)=8 TeV at the LHC. Events with photons and jets with high transverse momenta are selected and the photon+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.
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http://hal.in2p3.fr/in2p3-01010551
Contributor : Sylvie Flores <>
Submitted on : Friday, June 20, 2014 - 7:25:20 AM
Last modification on : Friday, June 5, 2020 - 10:52:07 AM

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V. Khachatryan, S. Baffioni, F. Beaudette, P. Busson, C. Charlot, et al.. Search for excited quarks in the photon+jet final state in proton-proton collisions at sqrt(s) = 8 TeV. Physics Letters B, Elsevier, 2014, 738, pp.274-293. ⟨10.1016/j.physletb.2014.09.048⟩. ⟨in2p3-01010551⟩

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