CMS-PAS-EXO-13-003

CMS-PAS-EXO-13-003
Search for excited quarks in the photon + jet final state in proton proton collisions at 8 TeV
CMS Collaboration
2014

Abstract: The paper presents a search for excited quarks $(q^{\star})$ decaying into a $\gamma+\mathrm{jet}$ final state at $\sqrt{s} =$ 8 TeV with the CMS experiment, using the dataset corresponding to an integrated luminosity of 19.7 fb $^{-1}$ collected during 2012 data taking at the LHC. Photons and $\mathrm{jets}$ with high transverse momentum are selected to search for a resonance peak in the $\gamma+\mathrm{jet}$ invariant mass distribution. The 95% confidence level upper limits on cross section times branching ratio are evaluated as a function of excited quark mass ( $M_{\mathrm q^{\star}}$ ). We exclude at 95% CL excited quarks with 0.7 $< M_{\mathrm q^{\star}} <$ 3.5 TeV for standard model couplings, and present exclusions of excited quark mass as a function of coupling strength.
Links: CDS record (PDF) ; inSPIRE record ; Public twiki page ; CADI line (restricted) ; These preliminary results are superseded in this paper, PLB 738 (2014) 274. The superseded preliminary plots can be found here.

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