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

Khachatryan, V ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1016/j.physletb.2014.09.048
  3. Abstract:
  4. 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-1 collected 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
  5. Keywords:
  6. CMS ; Jet ; photon ; Physics
  7. Source: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics ; Vol. 738, issue , 2014 , pp. 274-293
  8. URL: http://www.sciencedirect.com/science/article/pii/S0370269314007060