Measurement of the top quark mass with the template method in the tt̄ +jets channel using ATLAS data

The top quark mass has been measured using the template method in the t t → lepton + jets channel based on data recorded in 2011 with the ATLAS detector at the LHC.The data were taken at a proton-proton centre-of-mass energy of √ s = 7 TeV and correspond to an integrated luminosity of 1.04 fb -1 .The analyses in the e + jets and μ + jets decay channels yield consistent results.The top quark mass is measured to be m top = 174.5 ± 0.6 stat ± 2.3 syst GeV.