Gas Detectors Performance in CMS and Excited Muon Search Feasibility Study at 14 teV

Within the Standard Model(SM) of particle physics, quarks and leptons are understood to be the fundamental particles and Their existence have been verified experimentally. A search for substructure of quarks or study of quark compositeness is carried out with the CMS detector at LHC, using $ 300 fb^{-1} $ of integrated luminosity at a center-of-mass energy$ \sqrt{s} =14 TeV $. The discovery of excited muons ($ \mu^{*} $) would be a first indication of lepton compositeness. In the current study, $ \mu^{*} $ is assumed to be produced via four-fermions contact interactions in association with a muon ($ \mu $) and to decay via the gauge mediated process $ \mu^{*} \to \mu\gamma$, yielding a final state with two muons and a photon. Monte Carlo (MC) samples are produced via MadGraph5 and PYTHIA 8 event generators. To simulate the detector response, GEANT4 which interfaced to CMS software was used for full simulation and Delphes was used for fast simulation, assuming the CMS detector configuration. Objects and event selections are optimized in order to maximize the signal to SM background ratio.