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

The normalized differential cross section of top-quark pair production in association with jets in the semileptonic ($e,\mu+$jets) top-quark pair decay channel has been investigated as a function of the nverse of the invariant mass of the $t\bar{t}+1-$jet system. This process is sensitive to the top...

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Autor principal: The ATLAS collaboration
Lenguaje:eng
Publicado: 2014
Materias:
Acceso en línea:http://cds.cern.ch/record/1951319
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author The ATLAS collaboration
author_facet The ATLAS collaboration
author_sort The ATLAS collaboration
collection CERN
description The normalized differential cross section of top-quark pair production in association with jets in the semileptonic ($e,\mu+$jets) top-quark pair decay channel has been investigated as a function of the nverse of the invariant mass of the $t\bar{t}+1-$jet system. This process is sensitive to the top-quark mass since gluon radiation depends on the mass of the quarks. The analysis is based on proton-proton collision data at a center-of-mass energy of 7 TeV collected by the ATLAS experiment at the LHC, and corresponding to an integrated luminosity of 4.6 $fb^{-1}$. The result is compared to a theoretical prediction at next-to-leading order accuracy in quantum chromodynamics, allowing to uniquely define the mass scheme. In this novel method the extracted top-quark pole mass is: \[ m^{pole}_{t}=173.7 \pm 1.5 ~({\rm stat.}) \pm 1.4 ~({\rm syst.})~ ^{+ 1.0}_{-0.5} ~({\rm theo.})~{\rm GeV}. \] The statistical uncertainty (stat.) is the largest error in this analysis. The experimental uncertainty (syst.) accounts for the imperfections in the modeling of the detector response, the background yield and the signal modeling. The theoretical error (theo.) includes the uncertainty due to missing higher orders in the perturbative NLO calculation in addition to those due to the parton distribution functions (PDFs) and the value of $\alpha_{s}$ used in the calculations.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2014
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spelling cern-19513192021-04-18T19:38:25Zhttp://cds.cern.ch/record/1951319engThe ATLAS collaborationDetermination of the top-quark pole mass using tt+1-jet events collected with the ATLAS experiment in 7 TeV pp collisionsParticle Physics - ExperimentThe normalized differential cross section of top-quark pair production in association with jets in the semileptonic ($e,\mu+$jets) top-quark pair decay channel has been investigated as a function of the nverse of the invariant mass of the $t\bar{t}+1-$jet system. This process is sensitive to the top-quark mass since gluon radiation depends on the mass of the quarks. The analysis is based on proton-proton collision data at a center-of-mass energy of 7 TeV collected by the ATLAS experiment at the LHC, and corresponding to an integrated luminosity of 4.6 $fb^{-1}$. The result is compared to a theoretical prediction at next-to-leading order accuracy in quantum chromodynamics, allowing to uniquely define the mass scheme. In this novel method the extracted top-quark pole mass is: \[ m^{pole}_{t}=173.7 \pm 1.5 ~({\rm stat.}) \pm 1.4 ~({\rm syst.})~ ^{+ 1.0}_{-0.5} ~({\rm theo.})~{\rm GeV}. \] The statistical uncertainty (stat.) is the largest error in this analysis. The experimental uncertainty (syst.) accounts for the imperfections in the modeling of the detector response, the background yield and the signal modeling. The theoretical error (theo.) includes the uncertainty due to missing higher orders in the perturbative NLO calculation in addition to those due to the parton distribution functions (PDFs) and the value of $\alpha_{s}$ used in the calculations.ATLAS-CONF-2014-053oai:cds.cern.ch:19513192014-09-30
spellingShingle Particle Physics - Experiment
The ATLAS collaboration
Determination of the top-quark pole mass using tt+1-jet events collected with the ATLAS experiment in 7 TeV pp collisions
title Determination of the top-quark pole mass using tt+1-jet events collected with the ATLAS experiment in 7 TeV pp collisions
title_full Determination of the top-quark pole mass using tt+1-jet events collected with the ATLAS experiment in 7 TeV pp collisions
title_fullStr Determination of the top-quark pole mass using tt+1-jet events collected with the ATLAS experiment in 7 TeV pp collisions
title_full_unstemmed Determination of the top-quark pole mass using tt+1-jet events collected with the ATLAS experiment in 7 TeV pp collisions
title_short Determination of the top-quark pole mass using tt+1-jet events collected with the ATLAS experiment in 7 TeV pp collisions
title_sort determination of the top-quark pole mass using tt+1-jet events collected with the atlas experiment in 7 tev pp collisions
topic Particle Physics - Experiment
url http://cds.cern.ch/record/1951319
work_keys_str_mv AT theatlascollaboration determinationofthetopquarkpolemassusingtt1jeteventscollectedwiththeatlasexperimentin7tevppcollisions