Tau lepton reconstruction and identification at ATLAS

Abstract

Tau leptons play an important role in the physics program at the LHC. They are used in searches for new phenomena like the Higgs boson or Supersymmetry and in electroweak measurements. Identifying hadron-ically decaying tau leptons with good performance is an essential part of these analyses. We present the current status of the tau reconstruction and identification at the LHC with the ATLAS detector. The tau identification efficiencies and their systematic uncertainties are measured using W → τν and Z → ττ events, and compared with the predictions from Monte Carlo simulations. © Owned by the authors 2012.