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Article: Observation of Centrality-Dependent Acoplanarity for Muon Pairs Produced via Two-Photon Scattering in Pb + Pb Collisions at √sNN=5.02 TeV with the ATLAS Detector

TitleObservation of Centrality-Dependent Acoplanarity for Muon Pairs Produced via Two-Photon Scattering in Pb + Pb Collisions at √sNN=5.02 TeV with the ATLAS Detector
Authors
Issue Date2018
PublisherAmerican Physical Society. The Journal's web site is located at http://prl.aps.org
Citation
Physical Review Letters, 2018, v. 121 n. 21, article no. 212301 , p. 1-21 How to Cite?
AbstractThis Letter presents a measurement of γγ→μ+μ- production in Pb+Pb collisions recorded by the ATLAS detector at the Large Hadron Collider at sNN=5.02 TeV with an integrated luminosity of 0.49 nb-1. The azimuthal angle and transverse momentum correlations between the muons are measured as a function of collision centrality. The muon pairs are produced from γγ through the interaction of the large electromagnetic fields of the nuclei. The contribution from background sources of muon pairs is removed using a template fit method. In peripheral collisions, the muons exhibit a strong back-to-back correlation consistent with previous measurements of muon pair production in ultraperipheral collisions. The angular correlations are observed to broaden significantly in central collisions. The modifications are qualitatively consistent with rescattering of the muons while passing through the hot matter produced in the collision.
Persistent Identifierhttp://hdl.handle.net/10722/266042
ISSN
2020 Impact Factor: 9.161
2020 SCImago Journal Rankings: 3.688
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLo, CY-
dc.contributor.authorOrlando, N-
dc.contributor.authorParedes Hernandez, DK-
dc.contributor.authorTu, Y-
dc.contributor.authorATLAS Collaboration-
dc.date.accessioned2018-12-17T02:16:37Z-
dc.date.available2018-12-17T02:16:37Z-
dc.date.issued2018-
dc.identifier.citationPhysical Review Letters, 2018, v. 121 n. 21, article no. 212301 , p. 1-21-
dc.identifier.issn0031-9007-
dc.identifier.urihttp://hdl.handle.net/10722/266042-
dc.description.abstractThis Letter presents a measurement of γγ→μ+μ- production in Pb+Pb collisions recorded by the ATLAS detector at the Large Hadron Collider at sNN=5.02 TeV with an integrated luminosity of 0.49 nb-1. The azimuthal angle and transverse momentum correlations between the muons are measured as a function of collision centrality. The muon pairs are produced from γγ through the interaction of the large electromagnetic fields of the nuclei. The contribution from background sources of muon pairs is removed using a template fit method. In peripheral collisions, the muons exhibit a strong back-to-back correlation consistent with previous measurements of muon pair production in ultraperipheral collisions. The angular correlations are observed to broaden significantly in central collisions. The modifications are qualitatively consistent with rescattering of the muons while passing through the hot matter produced in the collision.-
dc.languageeng-
dc.publisherAmerican Physical Society. The Journal's web site is located at http://prl.aps.org-
dc.relation.ispartofPhysical Review Letters-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.titleObservation of Centrality-Dependent Acoplanarity for Muon Pairs Produced via Two-Photon Scattering in Pb + Pb Collisions at √sNN=5.02 TeV with the ATLAS Detector-
dc.typeArticle-
dc.identifier.emailOrlando, N: norlando@HKUCC-COM.hku.hk-
dc.identifier.emailParedes Hernandez, DK: dparedes@hku.hk-
dc.identifier.emailTu, Y: yanjuntu@hku.hk-
dc.identifier.authorityTu, Y=rp01971-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1103/PhysRevLett.121.212301-
dc.identifier.pmid30517793-
dc.identifier.scopuseid_2-s2.0-85057454413-
dc.identifier.hkuros296375-
dc.identifier.volume121-
dc.identifier.issue21-
dc.identifier.spagearticle no. 212301, p. 1-
dc.identifier.epagearticle no. 212301, p. 21-
dc.identifier.isiWOS:000450552800004-
dc.publisher.placeUnited States-
dc.identifier.issnl0031-9007-

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