Searches for Single Top-Quark Production with the ATLAS Detector in pp Collisions at √s = 7 TeV

We present the result of searches for single top-quark production in 7 TeV proton-proton collisions recorded with the ATLAS detector. The t-channel search is based on 2011 data and selects of events with a single lepton (muon or electron), jets and missing transverse energy. The t-channel production cross section measured in a cut-based and a neural network analysis is found to be consistent with the Standard Model expectation. The Wt-channel analysis is based on the full 2010 data and selects events with one or two leptons, jets and missing transverse energy. A 95% confidence level limit is set on the Wt-channel production cross section.