Search for Excited Quarks in $q\bar{q}\to \gamma \gamma$ at the LHC

Abstract

If quarks are composite particles, then excited states are expected to play a rôle in the Large Hadron Collider phenomena. Concentrating on virtual effects, and using a large part of the CMS detection criteria, we present here a realistic examination of their effect in diphoton production at the LHC. For various luminosities, we present the 99 % confidence limit (CL) achievable in $\Lambda -M_{q\ast }$ parameter space where $\Lambda$ is the compositeness scale and M_{q^*} the mass of the state. For a q^* of mass 0.5 TeV, $\Lambda \le 1.55(2.95)$ can be excluded at 99% CL with 30 (200)${\mathrm{fb}}^{-1}$ integrated luminosity.

arXiv comment11 pages, 11 figures

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Cited by in corpus (8)

• Quark Excitations Through the Prism of Direct Photon Plus Jet at the LHC
• Looking for a vectorlike B quark at LHC using jet substructure
• Production of exotic composite quarks at the LHC
• Search for excited leptons in $\ell \ell \gamma$ final states in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Probing the light radion through diphotons at the Large Hadron Collider
• Search for single production of vectorlike $B$-quarks at the LHC
• Search for the lightest scalar top quark in R-parity violating decays at the LHC
• Two photon decay of Z' as a probe of Bose symmetry violation at the CERN LHC