Measurement of the top quark mass with the template method in the top antitop -> lepton + jets channel using ATLAS data

TL;DR

This paper reports a precise measurement of the top quark mass using the template method in lepton+jets decay channels with ATLAS data from 2011, achieving a result of 174.5 GeV.

Contribution

It introduces a measurement of the top quark mass using the template method in the lepton+jets channel with ATLAS data at 7 TeV, providing a new precise value.

Findings

Measured top quark mass: 174.5 GeV

Consistent results in electron+jets and muon+jets channels

Total uncertainty: approximately 2.4 GeV

Abstract

The top quark mass has been measured using the template method in the top antitop -> 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 sqrt(s) = 7 TeV and correspond to an integrated luminosity of 1.04/fb. The analyses in the electron + jets and muon + 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.