Determination of the top-quark pole mass using t t¯ + 1-jet events collected with the ATLAS experiment in 7 TeV pp collisions

doi:10.1007/JHEP10(2015)121

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ATLAS, детектор | 2015 | Chelkov, G. A.

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DOI Доступ к ресурсу на сайте издателя				10.1007/JHEP10(2015)121

Title: Determination of the top-quark pole mass using t t¯ + 1-jet events collected with the ATLAS experiment in 7 TeV pp collisions
Creator: Aad, G.
Creator: Abdallah, J.
Creator: Chelkov, G. A.
Creator: Abbott, B.
Contributor: Томский государственный университет Радиофизический факультет Научные подразделения РФФ
Subject: ATLAS, детектор
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Date: 2015
DOI: 10.1007/JHEP10(2015)121
Description: 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, mpolet, 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.

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collection(s): Радиофизический факультет
Identifier: vtls:000534118
http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000534118
Type: статьи в журналах
Source: Journal of high energy physics. 2015. № 10. P. 121 (1-40)
Language: eng

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Радиофизический факультет Determination of the top-quark pole mass using t t¯ + 1-jet events collected with the ATLAS experiment in 7 TeV pp collisions