  Tau leptons play an important role in the physics program in ATLAS. They can
be used not only in searches for new phenomena like the Higgs boson or
Supersymmetry, or for electroweak measurements but also in detector related
studies like the determination of the missing transverse energy scale.
Identifying hadronically decaying tau leptons requires good understanding of
the detector performance, combining information from calorimeter and tracking
detectors. The current status of the tau reconstruction and identification with
the ATLAS detector is presented. The identification efficiencies are measured
with W -> tau nu events, and found to be consistent with the prediction from
Monte Carlo simulations.

High Energy Physics - Experiment