Determination of the top-quark pole mass using t [¯ over t] + 1-jet events collected with the ATLAS experiment in 7 TeV pp collisions
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JHEP10(2015)121.pdf
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Author(s)
Taylor, Frank E
Date Issued
October 2015
Journal
Journal of High Energy Physics
Publisher
Springer Nature
Citation
The ATLAS collaboration, et al. “Determination of the Top-Quark Pole Mass Using t[ ¯ over t] + 1-Jet Events Collected with the ATLAS Experiment in 7 TeV Pp Collisions.” Journal of High Energy Physics, vol. 2015, no. 10, Oct. 2015. © 2015 The Authors
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Final published version
Abstract
The 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 t[¯ over t] + 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[superscript −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[subscript t[superscript pole]], is:m[superscript pole][subscript t]=173.7±1.5stat.±1.4syst.−0.5+1.0(theory)GeV. This result represents the most precise measurement of the top-quark pole mass to date.[Figure not available: see fulltext.]
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Creative Commons Attribution 4.0 International License
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DOI of Published Version
https://doi.org/10.1007/JHEP10(2015)121
