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Measurement of the inclusive $t\bar{t}$ cross-section in the lepton+jets channel in $pp$ collisions at $\sqrt{s} = 8$ TeV with the ATLAS detector
The inclusive $t\bar{t}$ production cross-section is measured in the lepton+jets channel using 20.2 fb$^{-1}$ of proton--proton collision data at a centre-of-mass energy of 8 TeV recorded with the ATLAS detector at the LHC. Major systematic uncertainties due to the modelling of the jet energy scale...
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Lenguaje: | eng |
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2017
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Acceso en línea: | http://cds.cern.ch/record/2273870 |
_version_ | 1780955035697414144 |
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author | The ATLAS collaboration |
author_facet | The ATLAS collaboration |
author_sort | The ATLAS collaboration |
collection | CERN |
description | The inclusive $t\bar{t}$ production cross-section is measured in the lepton+jets channel using 20.2 fb$^{-1}$ of proton--proton collision data at a centre-of-mass energy of 8 TeV recorded with the ATLAS detector at the LHC. Major systematic uncertainties due to the modelling of the jet energy scale and $b$-tagging efficiency are constrained by separating selected events into three disjoint regions. In order to reduce systematic uncertainties in the most important background, the W+jets process is modelled using Z+jets events in a data-based approach. The inclusive $t\bar{t}$ cross-section is measured with a precision of 5.7% to be $\sigma_{t\bar{t}} = 248.3 \pm 0.7 \, (\mathrm{stat.}) \pm 13.4 \, (\mathrm{syst.}) \pm 4.7 \, (\mathrm{lumi.})~\text{pb}$, assuming a top-quark mass of 172.5 GeV. The result is in agreement with the Standard Model prediction. |
id | cern-2273870 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2017 |
record_format | invenio |
spelling | cern-22738702021-04-18T19:39:09Zhttp://cds.cern.ch/record/2273870engThe ATLAS collaborationMeasurement of the inclusive $t\bar{t}$ cross-section in the lepton+jets channel in $pp$ collisions at $\sqrt{s} = 8$ TeV with the ATLAS detectorParticle Physics - ExperimentThe inclusive $t\bar{t}$ production cross-section is measured in the lepton+jets channel using 20.2 fb$^{-1}$ of proton--proton collision data at a centre-of-mass energy of 8 TeV recorded with the ATLAS detector at the LHC. Major systematic uncertainties due to the modelling of the jet energy scale and $b$-tagging efficiency are constrained by separating selected events into three disjoint regions. In order to reduce systematic uncertainties in the most important background, the W+jets process is modelled using Z+jets events in a data-based approach. The inclusive $t\bar{t}$ cross-section is measured with a precision of 5.7% to be $\sigma_{t\bar{t}} = 248.3 \pm 0.7 \, (\mathrm{stat.}) \pm 13.4 \, (\mathrm{syst.}) \pm 4.7 \, (\mathrm{lumi.})~\text{pb}$, assuming a top-quark mass of 172.5 GeV. The result is in agreement with the Standard Model prediction.ATLAS-CONF-2017-054oai:cds.cern.ch:22738702017-07-10 |
spellingShingle | Particle Physics - Experiment The ATLAS collaboration Measurement of the inclusive $t\bar{t}$ cross-section in the lepton+jets channel in $pp$ collisions at $\sqrt{s} = 8$ TeV with the ATLAS detector |
title | Measurement of the inclusive $t\bar{t}$ cross-section in the lepton+jets channel in $pp$ collisions at $\sqrt{s} = 8$ TeV with the ATLAS detector |
title_full | Measurement of the inclusive $t\bar{t}$ cross-section in the lepton+jets channel in $pp$ collisions at $\sqrt{s} = 8$ TeV with the ATLAS detector |
title_fullStr | Measurement of the inclusive $t\bar{t}$ cross-section in the lepton+jets channel in $pp$ collisions at $\sqrt{s} = 8$ TeV with the ATLAS detector |
title_full_unstemmed | Measurement of the inclusive $t\bar{t}$ cross-section in the lepton+jets channel in $pp$ collisions at $\sqrt{s} = 8$ TeV with the ATLAS detector |
title_short | Measurement of the inclusive $t\bar{t}$ cross-section in the lepton+jets channel in $pp$ collisions at $\sqrt{s} = 8$ TeV with the ATLAS detector |
title_sort | measurement of the inclusive $t\bar{t}$ cross-section in the lepton+jets channel in $pp$ collisions at $\sqrt{s} = 8$ tev with the atlas detector |
topic | Particle Physics - Experiment |
url | http://cds.cern.ch/record/2273870 |
work_keys_str_mv | AT theatlascollaboration measurementoftheinclusivetbartcrosssectionintheleptonjetschannelinppcollisionsatsqrts8tevwiththeatlasdetector |