Study for Sensitivity for W' to \tau \nu with CMS

In this bachelor thesis we took a first look at the heavy gauge boson W' decaying into a tau and tau-neutrino. First we have a detailed look at the W' and tau decay and its kinematic by studying generator level information of a W' sample. Secondly we study in detail the leptonic decay modes of the tau into an electron or muon and two neutrinos and at last we have a first look on the hadronic decay modes of the tau, by using hadronic jets and particle-flow taus reconstructed out of hadronic jets. The whole analysis is done with about 900 pb−1 of 2011 CMS data.