Observing Anomalous Di-boson couplings in Z gamma gamma and Z Z gamma vertices at CMS

This note presents a study of the anomalous couplings of the Z gamma gamma and Z Z gamma vertices. An independent NLL Monte Carlo event generator has been combined with the CMSJET detector simulation to provide a realistic simulation of the process at CMS. The methods to determine the presence of anomalous couplings have been evaluated. We show that the photon transverse momentum spectrum and the transverse mass of the lepton lepton gamma are the most sensitive to Standard Model deviations and can be used to provide improved sensitivities of the anomalous couplings at the LHC energies.