Resonance search for new physics in the photon+jet final state at 13 TeV

A search is presented for excited quarks ( q ∗ ) decaying into γ + jet final state in p p collisions at √ s = 13 TeV. The search is done with the data taken by the CMS experiment at the CERN LHC in 2015 corresponding to an integrated luminosity of 2 . 7 f b − 1 . Results are presented in terms of 95% CL upper limits on cross section times branching fraction as a function of excited quark mass ( M q ∗ ). Limits on excited quarks are presented as a function of their mass and coupling strength; masses below 4 . 37 TeV are excluded at 95% CL for coupling multipliers f = 1 . 0.