Reconstruction and identification of hadronic τ decays in ATLAS

The identification of τ jets from the hadronic τ decay is crucial for the study of many physics channels like the production of Higgs bosons decaying to τ or SUSY. The τ jet reconstruction in ATLAS is performed starting from the energy deposited in the calorimeters or also combining measurements from calorimeter and tracking with an energy-flow technique. Quantities built both from the calorimeters and from the inner detector are used to identify τ jets against other jets. In the talk we will review the performance of τ jet reconstruction and identification, showing that the excellent τ efficiency versus the jet-rejection obtained in ATLAS will allow the study of channels where the background from jets is potentially very large.