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Search for excited quarks in the γ + jet final state in proton–proton collisions at √s = 8 TeV
Journal article   Open access   Peer reviewed

Search for excited quarks in the γ + jet final state in proton–proton collisions at √s = 8 TeV

Vardan Khachatryan, Felix Bachmair, Lukas Bäni, Lorenzo Bianchini, Pierluigi Bortignon, Marco A Buchmann, Bruno Casal, Nicolas Chanon, Amanda Deisher, Günther Dissertori, …
Physics letters. B, Vol.738, pp.274-293
11/01/2014
DOI: 10.1016/j.physletb.2014.09.048
url
https://doi.org/10.1016/j.physletb.2014.09.048View
Published (Version of record) Open Access

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 19.7fb−1collected by the CMS experiment in proton-proton collisions at √s = 8TeV at the LHC. Events with photons and jets with high transverse momenta are selected and the γ+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
High Energy Physics Physics Experiment Jet Photon

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