Resonance search for quark excitation in the gamma + jet final state at CMS

This poster presents a search for excited quarks (q*) decaying into a $\gamma$ + jet final state at $\sqrt{\rm s}$= 8 TeV with the CMS experiment, using the dataset corresponding to an integrated luminosity of 19.7 $\,\text{fb}^\text{-1}$ collected during 2012 data taking at the LHC. Photons and jets with high transverse momentum are selected to search for a resonance peak in the $\gamma$ + jet invariant mass distribution. The 95\% confidence level upper limits on cross section times branching ratio are evaluated as a function of excited quark mass (Mq*). We exclude at 95\% CL excited quarks with 0.7 $<$ Mq* $<$ 3.5 TeV for standard model couplings, and present exclusions of excited quark mass as a function of coupling strength.