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|Title:||Determination of the top-quark pole mass using t¯t + 1-jet events collected with the ATLAS experiment in 7TeV pp collisions|
|Other Titles:||Determination of the top-quark pole mass using t -bar t + 1-jet events collected with the ATLAS experiment in 7TeV pp collisions|
|Author:||The ATLAS collaboration|
Abdel Khalek, S.
|Citation:||Journal of High Energy Physics, 2015; 2015(10):121-0-121-40|
|The ATLAS collaboration, G. Aad ... P. Jackson ... L. Lee ... A. Petridis ... A. Qureshi ... N. Soni ... M.J. White ... et al.|
|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 tt¯ + 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 t pole , is: mpolet=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.|
|Keywords:||Hadron-Hadron Scattering; Top physics|
|Description:||Published: October 19, 2015|
|Rights:||Copyright: © The Author(s) 2015. Open Access. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.|
|Appears in Collections:||Physics publications|
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