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117391 |
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|a Taylor, Frank E
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|a Massachusetts Institute of Technology. Department of Physics
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|a Taylor, Frank E
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|a 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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|b Springer Nature,
|c 2018-08-17T14:11:41Z.
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|z Get fulltext
|u http://hdl.handle.net/1721.1/117391
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|a 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.]
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|a United States. Department of Energy
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|a National Science Foundation (U.S.)
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|a Article
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|t Journal of High Energy Physics
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