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Performance of high-pT electron identification in lead-lead collisions at 5.02 TeV with the ATLAS detector
Electrons may be copiously produced in heavy-ion collisions. They constitute important final states from leptonic decay channels of Z and W bosons. Their reconstruction and identification is very challenging in heavy-ion collisions due to large detector occupancy varying strongly with the collision...
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Lenguaje: | eng |
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2016
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Acceso en línea: | http://cds.cern.ch/record/2220091 |
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author | Kremer, Jakub Andrzej |
author_facet | Kremer, Jakub Andrzej |
author_sort | Kremer, Jakub Andrzej |
collection | CERN |
description | Electrons may be copiously produced in heavy-ion collisions. They constitute important final states from leptonic decay channels of Z and W bosons. Their reconstruction and identification is very challenging in heavy-ion collisions due to large detector occupancy varying strongly with the collision centrality. The presented material will discuss performance of high-pT electrons, including trigger, reconstruction and identification in lead-lead data collected at 5.02 TeV by the ATLAS detector in 2015. Studies will be focused on optimization of the likelihood approach for identifying signal electrons coming mostly from W and Z boson decays. The likelihood method has been applied successfully in proton-proton collisions in the ATLAS experiment, but in order to perform well in lead-lead collisions, centrality dependence has had to be considered. Also during the 2015 heavy-ion run the ATLAS tracker operated with a different gas mixture from the nominal one used for electron identification in proton-proton collisions. Its impact on electron performance also will be discussed. |
id | cern-2220091 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2016 |
record_format | invenio |
spelling | cern-22200912019-09-30T06:29:59Zhttp://cds.cern.ch/record/2220091engKremer, Jakub AndrzejPerformance of high-pT electron identification in lead-lead collisions at 5.02 TeV with the ATLAS detectorParticle Physics - ExperimentElectrons may be copiously produced in heavy-ion collisions. They constitute important final states from leptonic decay channels of Z and W bosons. Their reconstruction and identification is very challenging in heavy-ion collisions due to large detector occupancy varying strongly with the collision centrality. The presented material will discuss performance of high-pT electrons, including trigger, reconstruction and identification in lead-lead data collected at 5.02 TeV by the ATLAS detector in 2015. Studies will be focused on optimization of the likelihood approach for identifying signal electrons coming mostly from W and Z boson decays. The likelihood method has been applied successfully in proton-proton collisions in the ATLAS experiment, but in order to perform well in lead-lead collisions, centrality dependence has had to be considered. Also during the 2015 heavy-ion run the ATLAS tracker operated with a different gas mixture from the nominal one used for electron identification in proton-proton collisions. Its impact on electron performance also will be discussed.ATL-PHYS-SLIDE-2016-718oai:cds.cern.ch:22200912016-09-28 |
spellingShingle | Particle Physics - Experiment Kremer, Jakub Andrzej Performance of high-pT electron identification in lead-lead collisions at 5.02 TeV with the ATLAS detector |
title | Performance of high-pT electron identification in lead-lead collisions at 5.02 TeV with the ATLAS detector |
title_full | Performance of high-pT electron identification in lead-lead collisions at 5.02 TeV with the ATLAS detector |
title_fullStr | Performance of high-pT electron identification in lead-lead collisions at 5.02 TeV with the ATLAS detector |
title_full_unstemmed | Performance of high-pT electron identification in lead-lead collisions at 5.02 TeV with the ATLAS detector |
title_short | Performance of high-pT electron identification in lead-lead collisions at 5.02 TeV with the ATLAS detector |
title_sort | performance of high-pt electron identification in lead-lead collisions at 5.02 tev with the atlas detector |
topic | Particle Physics - Experiment |
url | http://cds.cern.ch/record/2220091 |
work_keys_str_mv | AT kremerjakubandrzej performanceofhighptelectronidentificationinleadleadcollisionsat502tevwiththeatlasdetector |