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Measurements of the Z boson via the two-lepton channels in heavy ion collisions in ATLAS

The ATLAS experiment has observed 1995 $Z$ boson candidates with 148,imb~ of integrated luminosity obtained in the 2011 LHC PbPb~ run at sqn=2.76,TeV. The $Z$ bosons are reconstructed via di-electron and di-muon decay channels. The results from both channels are consistent with each other and are co...

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Autor principal: Citron, Z
Lenguaje:eng
Publicado: 2012
Materias:
Acceso en línea:http://cds.cern.ch/record/1452631
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author Citron, Z
author_facet Citron, Z
author_sort Citron, Z
collection CERN
description The ATLAS experiment has observed 1995 $Z$ boson candidates with 148,imb~ of integrated luminosity obtained in the 2011 LHC PbPb~ run at sqn=2.76,TeV. The $Z$ bosons are reconstructed via di-electron and di-muon decay channels. The results from both channels are consistent with each other and are combined. The background is less than 3% of our selected sample. Within the statistical and systematic uncertainties, the $Z$ boson yield integrated over $|y|<2.5$ is proportional to the number of binary collisions estimated by the Glauber model. The elliptic flow coefficient of the azimuthal distribution of the $Z$ boson with respect to the event plane is consistent with zero, in line with expectations of production in unmodified hard scattering.
id cern-1452631
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2012
record_format invenio
spelling cern-14526312019-09-30T06:29:59Zhttp://cds.cern.ch/record/1452631engCitron, ZMeasurements of the Z boson via the two-lepton channels in heavy ion collisions in ATLASDetectors and Experimental TechniquesThe ATLAS experiment has observed 1995 $Z$ boson candidates with 148,imb~ of integrated luminosity obtained in the 2011 LHC PbPb~ run at sqn=2.76,TeV. The $Z$ bosons are reconstructed via di-electron and di-muon decay channels. The results from both channels are consistent with each other and are combined. The background is less than 3% of our selected sample. Within the statistical and systematic uncertainties, the $Z$ boson yield integrated over $|y|<2.5$ is proportional to the number of binary collisions estimated by the Glauber model. The elliptic flow coefficient of the azimuthal distribution of the $Z$ boson with respect to the event plane is consistent with zero, in line with expectations of production in unmodified hard scattering.ATL-PHYS-SLIDE-2012-301oai:cds.cern.ch:14526312012-05-30
spellingShingle Detectors and Experimental Techniques
Citron, Z
Measurements of the Z boson via the two-lepton channels in heavy ion collisions in ATLAS
title Measurements of the Z boson via the two-lepton channels in heavy ion collisions in ATLAS
title_full Measurements of the Z boson via the two-lepton channels in heavy ion collisions in ATLAS
title_fullStr Measurements of the Z boson via the two-lepton channels in heavy ion collisions in ATLAS
title_full_unstemmed Measurements of the Z boson via the two-lepton channels in heavy ion collisions in ATLAS
title_short Measurements of the Z boson via the two-lepton channels in heavy ion collisions in ATLAS
title_sort measurements of the z boson via the two-lepton channels in heavy ion collisions in atlas
topic Detectors and Experimental Techniques
url http://cds.cern.ch/record/1452631
work_keys_str_mv AT citronz measurementsofthezbosonviathetwoleptonchannelsinheavyioncollisionsinatlas