Search for excited states of light and heavy flavor quarks in the $\gamma\mathrm{+jet}$ final state in proton-proton collisions at $\sqrt{s}=13~\mathrm{TeV}$

A search for excited states of light and heavy flavor quarks decaying into the $\gamma\mathrm{+jet}$ final state is presented. The analysis is based on data corresponding to an integrated luminosity of $35.9~\mathrm{fb^{-1}}$ collected by the CMS experiment in proton-proton collisions at $\sqrt{s}=13~\mathrm{TeV}$ in 2016 at the LHC. Events containing at least one photon and one jet with high transverse momenta are selected and the $\gamma\mathrm{+jet}$ invariant mass distribution is searched for a resonance peak. The upper limits on the cross section times branching fraction are evaluated as a function of the excited quark masses. At $95\%$ confidence level, the most stringent limits are presented in $\gamma\mathrm{+jet}$ final state to exclude the excited light quarks with masses below $5.5~\mathrm{TeV}$ and the excited b quarks with masses below $1.8~\mathrm{TeV}$ for coupling multiplier $f = 1.0$.