Morii, MasahiroFranklin, MelissaClark, BHuth, JohnSpearman, WilliamLopez Mateos, DIppolito, VictoriaBarreiro Guimarães da Costa, JSkottowe, H2020-05-042015-10ATLAS Collaboration. 2015. Determination of the Top-Quark Pole Mass Using T T + 1-Jet Events Collected With the ATLAS Experiment in 7 TeV Pp Collisions. Journal of High Energy Physics 121.1029-8479http://nrs.harvard.edu/urn-3:HUL.InstRepos:42663149The normalized differential cross section for top-quark pair production in association with at least one jet is studied as a function of the inverse of the invariant mass of the ����⎯⎯+ 1-jet system. This distribution can be used for a precise determination of the top-quark mass since gluon radiation depends on the mass of the quarks. The experimental analysis is based on proton-proton collision data collected by the ATLAS detector at the LHC with a centre-of-mass energy of 7 TeV corresponding to an integrated luminosity of 4.6 fb−1. The selected events were identified using the lepton+jets top-quark-pair decay channel, where lepton refers to either an electron or a muon. The observed distribution is compared to a theoretical prediction at next-to-leading-order accuracy in quantum chromodynamics using the pole-mass scheme. With this method, the measured value of the top-quark pole mass, m pole t , is: ��pole��=173.7±1.5(stat.)±1.4(syst.)+1.0−0.5(theory)GeV. This result represents the most precise measurement of the top-quark pole mass to date.en-USNuclear and High Energy PhysicsJournal Article2018-08-0120152020-05-0410.1007/jhep10(2015)121