Search for W' in Lepton+Missing ET Final State With Early Data at ATLAS

Extensions of the Standard Model gauge symmetries imply the existence of new heavy charged gauge boson generically denoted as W'. Assuming its Standard Model-like couplings to fermions, we evaluate the ATLAS discovery potential of such a boson in lepton (electron and muon) plus Missing ET final state.The whole study is based on the full detector simulation data which include trigger performance and realistic detector calibration.Relevant systematic uncertainties are addressed. The study is focused at early stages of data taking with center of mass energy of sqrt(s)=14 TeV.