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Article: Two-particle azimuthal correlations in photonuclear ultraperipheral Pb + Pb collisions at 5.02 TeV with ATLAS
Title | Two-particle azimuthal correlations in photonuclear ultraperipheral Pb + Pb collisions at 5.02 TeV with ATLAS |
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Authors | |
Issue Date | 2021 |
Publisher | American Physical Society. The Journal's web site is located at http://journals.aps.org/prc/ |
Citation | Physical Review C: covering nuclear physics, 2021, v. 104 n. 1, p. article no. 014903 How to Cite? |
Abstract | Two-particle long-range azimuthal correlations are measured in photonuclear collisions using 1.7nb-1 of 5.02 TeV Pb+Pb collision data collected by the ATLAS experiment at the CERN Large Hadron Collider. Candidate events are selected using a dedicated high-multiplicity photonuclear event trigger, a combination of information from the zero-degree calorimeters and forward calorimeters, and from pseudorapidity gaps constructed using calorimeter energy clusters and charged-particle tracks. Distributions of event properties are compared between data and Monte Carlo simulations of photonuclear processes. Two-particle correlation functions are formed using charged-particle tracks in the selected events, and a template-fitting method is employed to subtract the nonflow contribution to the correlation. Significant nonzero values of the second- and third-order flow coefficients are observed and presented as a function of charged-particle multiplicity and transverse momentum. The results are compared with flow coefficients obtained in proton-proton and proton-lead collisions in similar multiplicity ranges, and with theoretical expectations. The unique initial conditions present in this measurement provide a new way to probe the origin of the collective signatures previously observed only in hadronic collisions. © 2021 CERN. CERN, for the ATLAS Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. |
Persistent Identifier | http://hdl.handle.net/10722/301679 |
ISSN | 2021 Impact Factor: 3.199 2020 SCImago Journal Rankings: 1.679 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Paredes Hernandez, D | - |
dc.contributor.author | PENG, C | - |
dc.contributor.author | TAM, KC | - |
dc.contributor.author | Tu, Y | - |
dc.contributor.author | ATLAS Collaboration | - |
dc.contributor.author | Pizzimento, L | - |
dc.date.accessioned | 2021-08-09T03:42:37Z | - |
dc.date.available | 2021-08-09T03:42:37Z | - |
dc.date.issued | 2021 | - |
dc.identifier.citation | Physical Review C: covering nuclear physics, 2021, v. 104 n. 1, p. article no. 014903 | - |
dc.identifier.issn | 2469-9985 | - |
dc.identifier.uri | http://hdl.handle.net/10722/301679 | - |
dc.description.abstract | Two-particle long-range azimuthal correlations are measured in photonuclear collisions using 1.7nb-1 of 5.02 TeV Pb+Pb collision data collected by the ATLAS experiment at the CERN Large Hadron Collider. Candidate events are selected using a dedicated high-multiplicity photonuclear event trigger, a combination of information from the zero-degree calorimeters and forward calorimeters, and from pseudorapidity gaps constructed using calorimeter energy clusters and charged-particle tracks. Distributions of event properties are compared between data and Monte Carlo simulations of photonuclear processes. Two-particle correlation functions are formed using charged-particle tracks in the selected events, and a template-fitting method is employed to subtract the nonflow contribution to the correlation. Significant nonzero values of the second- and third-order flow coefficients are observed and presented as a function of charged-particle multiplicity and transverse momentum. The results are compared with flow coefficients obtained in proton-proton and proton-lead collisions in similar multiplicity ranges, and with theoretical expectations. The unique initial conditions present in this measurement provide a new way to probe the origin of the collective signatures previously observed only in hadronic collisions. © 2021 CERN. CERN, for the ATLAS Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. | - |
dc.language | eng | - |
dc.publisher | American Physical Society. The Journal's web site is located at http://journals.aps.org/prc/ | - |
dc.relation.ispartof | Physical Review C: covering nuclear physics | - |
dc.rights | Copyright [2021] by The American Physical Society. This article is available online at [http://dx.doi.org/10.1103/PhysRevC.104.014903]. | - |
dc.rights | This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. | - |
dc.title | Two-particle azimuthal correlations in photonuclear ultraperipheral Pb + Pb collisions at 5.02 TeV with ATLAS | - |
dc.type | Article | - |
dc.identifier.email | Paredes Hernandez, D: dparedes@hku.hk | - |
dc.identifier.email | Tu, Y: yanjuntu@hku.hk | - |
dc.identifier.authority | Tu, Y=rp01971 | - |
dc.description.nature | published_or_final_version | - |
dc.identifier.doi | 10.1103/PhysRevC.104.014903 | - |
dc.identifier.scopus | eid_2-s2.0-85110287422 | - |
dc.identifier.hkuros | 323883 | - |
dc.identifier.volume | 104 | - |
dc.identifier.issue | 1 | - |
dc.identifier.spage | article no. 014903 | - |
dc.identifier.epage | article no. 014903 | - |
dc.identifier.isi | WOS:000672773000006 | - |
dc.publisher.place | United States | - |