Aaboud, M.Aad, G.Abbott, B.Abdinov, O.Abeloos, B.Abhayasinghe, D.K.Abidi, S.H.AbouZeid, O.S.Abraham, N.L.Abramowicz, H.Albert, JustinAnelli, Christopher R.Chiu, Y.H.Ghasemi Bostanabad, M.Hamano, KenjiHill, Ewan ChinKeeler, RichardKowalewski, RobertLefebvre, M.et al.2020-11-122020-11-1220192019Aaboud, M., Aad, G., Abbott, B., Abdinov, O., Abeloos, B., Abhayasinghe, D.K., … Zwalinski, L (2019). Measurement of the top quark mass in the tt¯→ lepton+jets channel from s√=8 TeV ATLAS data and combination with previous results. The European Physical Journal C, 79(4). https://doi.org/10.1140/epjc/s10052-019-6757-9https://doi.org/10.1140/epjc/s10052-019-6757-9http://hdl.handle.net/1828/12342The top quark mass is measured using a template method in the tt¯→lepton+jets channel (lepton is e or μ) using ATLAS data recorded in 2012 at the LHC. The data were taken at a proton–proton centre-of-mass energy of s√=8 TeV and correspond to an integrated luminosity of 20.2 fb−1. The tt¯→lepton+jets channel is characterized by the presence of a charged lepton, a neutrino and four jets, two of which originate from bottom quarks (b). Exploiting a three-dimensional template technique, the top quark mass is determined together with a global jet energy scale factor and a relative b-to-light-jet energy scale factor. The mass of the top quark is measured to be mtop=172.08±0.39(stat)±0.82(syst) GeV. A combination with previous ATLAS mtop measurements gives mtop=172.69±0.25(stat)±0.41(syst) GeV.enArticleDepartment of Physics and Astronomy