Search for Supersymmetrie using Multileptonic Signatures in Proton-Proton Collisions with the CMS Detector at the LHC

A search for mutlileptonic signatures with three or more isolated leptons in pp collisions at sqrt(s)=7 TeV is presented in this Thesis. The data, recorded with the CMS experiment at the LHC in 2011 , corresponds to an integrated luminosity of 4.7 fb^-1. The observed multilepton events are categorized into exclusive search channels based on the identity and kinematics of the objects and the events. The search results are interpreted in the context of R-parity conserving supersymmetric models.