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Longitudinal decorrelation measurements from pp to A+A with the ATLAS detectoror

his talk presents new measurements of longitudinal flow decorrelations in 5.02 TeV and 13 TeV pp collisions and 5.44 TeV Xe+Xe collisions with the ATLAS detector. The measurements are performed using the two-particle correlation method with charged-particle tracks within |eta| < 2.5 and clust...

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Autor principal: Nagle, James Lawrence
Lenguaje:eng
Publicado: 2022
Materias:
Acceso en línea:http://cds.cern.ch/record/2813842
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author Nagle, James Lawrence
author_facet Nagle, James Lawrence
author_sort Nagle, James Lawrence
collection CERN
description his talk presents new measurements of longitudinal flow decorrelations in 5.02 TeV and 13 TeV pp collisions and 5.44 TeV Xe+Xe collisions with the ATLAS detector. The measurements are performed using the two-particle correlation method with charged-particle tracks within |eta| < 2.5 and clusters within 4.0 < |eta| < 4.9. Due to the larger influence of non-flow effects in small collision systems, template-based subtraction procedures are developed and applied to the measurement. These effects are observed to play a role even in large systems such as 5.44 TeV Xe+Xe collisions. Flow decorrelations are characterized in terms of the ratio of the correlations with a large pseudorapidity gap to those with small pseudorapidity gap, r_n, where n is the flow harmonic moment. Results are reported for the slope of r_2 as a function of pseudorapidity gap as a function of charged-particle multiplicity for the pp and Xe+Xe collision systems. This gives some of the first detailed information on the correlation between longitudinal and transverse energy deposition in pp collisions.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2022
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spelling cern-28138422022-06-28T21:52:58Zhttp://cds.cern.ch/record/2813842engNagle, James LawrenceLongitudinal decorrelation measurements from pp to A+A with the ATLAS detectororParticle Physics - Experimenthis talk presents new measurements of longitudinal flow decorrelations in 5.02 TeV and 13 TeV pp collisions and 5.44 TeV Xe+Xe collisions with the ATLAS detector. The measurements are performed using the two-particle correlation method with charged-particle tracks within |eta| < 2.5 and clusters within 4.0 < |eta| < 4.9. Due to the larger influence of non-flow effects in small collision systems, template-based subtraction procedures are developed and applied to the measurement. These effects are observed to play a role even in large systems such as 5.44 TeV Xe+Xe collisions. Flow decorrelations are characterized in terms of the ratio of the correlations with a large pseudorapidity gap to those with small pseudorapidity gap, r_n, where n is the flow harmonic moment. Results are reported for the slope of r_2 as a function of pseudorapidity gap as a function of charged-particle multiplicity for the pp and Xe+Xe collision systems. This gives some of the first detailed information on the correlation between longitudinal and transverse energy deposition in pp collisions.ATL-PHYS-SLIDE-2022-245oai:cds.cern.ch:28138422022-06-28
spellingShingle Particle Physics - Experiment
Nagle, James Lawrence
Longitudinal decorrelation measurements from pp to A+A with the ATLAS detectoror
title Longitudinal decorrelation measurements from pp to A+A with the ATLAS detectoror
title_full Longitudinal decorrelation measurements from pp to A+A with the ATLAS detectoror
title_fullStr Longitudinal decorrelation measurements from pp to A+A with the ATLAS detectoror
title_full_unstemmed Longitudinal decorrelation measurements from pp to A+A with the ATLAS detectoror
title_short Longitudinal decorrelation measurements from pp to A+A with the ATLAS detectoror
title_sort longitudinal decorrelation measurements from pp to a+a with the atlas detectoror
topic Particle Physics - Experiment
url http://cds.cern.ch/record/2813842
work_keys_str_mv AT naglejameslawrence longitudinaldecorrelationmeasurementsfrompptoaawiththeatlasdetectoror