Supersymmetry was primarily introduced as a soultion for the hierarchy problem and the quadratic divergences. In the first step of this work we study supersymmetry using the data of CMS experiment at CERN. The analysis contains data sample of proton-proton collisions at center-of-mass energies of 8 TeV, collected with CMS. The analysis is performed when Charginos decay into 2 tau leptons and 2 neutralinos. In this analysis we consider the case in which one of the taus decays into an electron and electron neutrino and the other one decays into muon, and the corresponding neutrinos. The stansverse mass () of two leptons is used as a search variable to distinguish between signal and background. The sum of the transverse mass of the two ?nal leptons is also found as a useful parameter in this Analysis. No signi?cance excess has been seen with respect to the predictions of the standard model, therefore, we ?nd an upper limit on the masses of the lightest chargino and neutralino. In the two step a search for SUSY in chargino pair production is performed when the charginos decay to two tau leptons, neutrino and neutralino,. Different final state use to 19.6 fb^{-1} of proton-proton collisions at sqrt(s)=8 TeV. The tau leptons is required to decay hadronically. of two leptons is used as a search variable to distinguish between signal and background. In a special part of the phase space with a moderate , the sum of the transverse mass of two leptons was found to be a useful variable. In different signal regions, no significant excess is seen with respect to the standard model prediction, so upper limits are set on the masses of the lightest chargino and neutralino. In the context of the simplified models, charginos lighter than 420GeV when the neutralino mass is zero are excluded at 95% confidence level. In the next step a search for the resonant production of high-mass photon pairs is presented. The analysis is based on samples of proton-proton collision data collected by the CMS experiment at center-of-mass energies of 8 and 13 TeV, corresponding to integrated luminosities of 19.7 and 3.3 fb^{-1}, respectively. The search focuses on spin-0 and spin-2 resonances with masses between 0.5 and 4 TeV and with widths, relative to the mass, between 1.4 10^{-4} and 5.6 10^{-2}. A modest excess of events compatible with a narrow resonance with a mass of about 750 GeV is observed. The local significance of the excess is approximately 3.4 standard deviations. The significance is reduced to 1.6 standard deviations once the effect of searching under multiple signal hypotheses is considered. More data are required to determine the origin of this excess. In the next step we study HCAL Noise Filters. Several sources of anomalous signals in HCAL have been observed which can be misinterpreted as energy deposits. It is essential to remove such anomalous signals so that they do not contribute to the measured energy attributed to collision events. Anomalous signals have distinct characteristics which can be used to distinguish them from collision signals. Several variables were considered, and R45 was found to be the most discriminating one. We present a summary of the updated for the 2015 running conditions anomalous HCAL signal ?lters.