Show simple item record

dc.contributor.authorATLAS Collaboration
dc.date.accessioned2024-08-13T03:25:53Z
dc.date.available2024-08-13T03:25:53Z
dc.date.issued2023-05-05
dc.identifier.citationAad, Georges, et al. "Measurement of muon pairs produced via γ γ scattering in nonultraperipheral Pb+ Pb collisions at s N N= 5.02 TeV with the ATLAS detector." Physical Review C 107.5 (2023): 054907.
dc.identifier.issn2469-9985
dc.identifier.doi10.1103/PhysRevC.107.054907
dc.identifier.urihttp://hdl.handle.net/10150/674267
dc.description.abstractResults of a measurement of dimuon photoproduction in nonultraperipheral Pb + Pb collisions at √sNN = 5.02 TeV are presented. Themeasurement uses ATLAS data from the 2015 and 2018 Pb + Pb data-taking periods at the LHC with an integrated luminosity of 1.94 nb.1. The γγ → μ+ μ- pairs are identified via selections on pair momentum asymmetry and acoplanarity. Differential cross sections for dimuon production are measured in different centrality, average muon momentum, and pair rapidity intervals as functions of acoplanarity and k⊥, the transverse momentum kick of one muon relative to the other. Measurements are also made as a function of the rapidity separation of the muons and the angle of the muon pair relative to the second-order event plane to test whether magnetic fields generated in the quark-gluon plasma affect the measured muons. A prior observation of a centrality-dependent broadening of the acoplanarity distribution is confirmed. Furthermore, the improved precision of the measurement reveals a depletion in the number of pairs having small acoplanarity or k⊥ values in more central collisions. The acoplanarity distributions in a given centrality interval are observed to vary with the mean pT of the muons in the pair, but the k⊥ distributions do not. Comparisons with recent theoretical predictions are made. The predicted trends associated with effects of magnetic fields on the dimuons are not observed. © 2023 CERN, for the ATLAS Collaboration.
dc.language.isoen
dc.publisherAmerican Physical Society
dc.rights© 2023 CERN, for the ATLAS Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license.
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleMeasurement of muon pairs produced via γγ scattering in nonultraperipheral Pb + Pb collisions at √sNN = 5.02 TeV with the ATLAS detector
dc.typeArticle
dc.typetext
dc.contributor.departmentDepartment of Physics, University of Arizona
dc.identifier.journalPhysical Review C
dc.description.noteImmediate access
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
dc.eprint.versionFinal Published Version
dc.source.journaltitlePhysical Review C
refterms.dateFOA2024-08-13T03:25:53Z


Files in this item

Thumbnail
Name:
PhysRevC.107.054907.pdf
Size:
4.089Mb
Format:
PDF
Description:
Final Published Version

This item appears in the following Collection(s)

Show simple item record

© 2023 CERN, for the ATLAS Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license.
Except where otherwise noted, this item's license is described as © 2023 CERN, for the ATLAS Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license.