Electron Vetoes and Taus at ATLAS

Strategies used to separate electron signatures from tau lepton signatures with the ATLAS detector are presented. Taus decay leptonically, to electrons or muons and neutrinos, or hadronically, to a number of neutral and charged hadrons and neutrinos. These decays happen before the taus reach the inner-most layer of the detector. Identification of hadronic taus is challenging because they are mimicked by electron signatures. Therefore, electron vetoes must be applied as a part of the tau identification procedure. The results of those cut-based and multivariate electron veto techniques are shown with 2010 and 2011 data collected by the ATLAS detector at a centre-of-mass energy of sqrt(s) = 7 TeV.