Measurement of the top quark mass with the template method in the tt ¯→ lepton + jets channel using ATLAS data

Abstract

The top quark mass has been measured using the template method in the tt ¯→ 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 mtop = 174.5 ± 0.6stat ± 2.3syst GeV.