Search for A W' gauge boson decaying to WZ in proton-proton collisions at √s = 7 TeV

This thesis presents a measurement of the WZ invariant mass spectrum and search for new exotic particles decaying to the WZ final state with electrons and muons using an integrated luminosity of 4.8 fb-1 of 7 TeV data collected by the CMS experiment at the LHC in 2011. No significant excess is observed in the mass distribution of the WZ candidates compared to the background expectation from Standard Model processes. Since there is no evidence for WZ resonances, lower bounds at %95 Confidence Level (C.L.) are set on the mass of hypothetical particles decaying to the WZ final state in Sequential Standard Model (SSM). Assuming the SSM, W' bosons with masses below 800 GeV have been excluded at %95 C.L.