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

ATLAS Collaboration

doi:10.1103/PhysRevLett.121.212301

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

ATLAS Collaboration

Mohamed I University
Aix-Marseille Université
University of Oklahoma
Azerbaijan National Academy of Sciences
Istanbul University
Université Paris-Saclay
Royal Holloway University of London
University of Toronto
University of Copenhagen
University of Sussex
Tel Aviv University
Technion-Israel Institute of Technology
Argonne National Laboratory
National Institute for Nuclear Physics
Abdus Salam International Centre for Theoretical Physics
The University of Tokyo
AGH University of Science and Technology
Northern Illinois University
Ludwig Maximilian University of Munich
Bogazici University
TRIUMF
Rutherford Appleton Laboratory
University of California at Santa Cruz
Alexandru Ioan Cuza University of Iaşi
Laboratório de Instrumentação e Física Experimental de Partículas
University of Granada
NOVA University Lisbon
Joint Institute for Nuclear Research
University of Louisville
University of Rome Tor Vergata
Kyoto University
Lund University
University of Geneva
RAS - P.N. Lebedev Physics Institute
University of Bologna
University of Victoria BC
Universidad Nacional de La Plata
Radboud University Nijmegen
CERN
Horia Hulubei National Institute of Physics and Nuclear Engineering
National Technical University of Athens
Czech Technical University in Prague
The University of Chicago
University of Washington
University of Oregon
University of Birmingham
ICREA
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University of Glasgow
University of Valencia
University of California at Berkeley
Universidade Federal do Rio de Janeiro
University of Oxford
Brandeis University
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University of Coimbra
German Electron Synchrotron
University of Sheffield
Université Paris-Saclay
University of Texas at Austin
Heidelberg University
University of Bern
University of Milan
Université Clermont Auvergne
University of Amsterdam
Columbia University
RAS - Budker Institute of Nuclear Physics
Novosibirsk State University
University of California at Irvine
High Energy Accelerator Research Organization, Tsukuba
Michigan State University
Duke University
University of Montreal
University of Iowa
Queen Mary University of London
University of Cambridge
University of Bonn
Alikhanov Institute for Theoretical and Experimental Physics
Johannes Gutenberg University Mainz
Uppsala University
United States Department of Energy
Comenius University
University of Cape Town
University of Illinois
University of Siegen
University of Science and Technology of China
CAS - Institute of High Energy Physics
California State University Fresno
University of Salento
University of Rome La Sapienza
Cracow
Simon Fraser University
Yale University
Louisiana Tech University
Weizmann Institute of Science
University of Pennsylvania School of Arts and Sciences
University of Wisconsin-Madison
University of Fribourg
University of Wuppertal
University of Melbourne
University of Genoa
Max Planck Institute for Physics (Werner Heisenberg Institute)
SLAC National Accelerator Laboratory
Shanghai Jiao Tong University
Universidad Autónoma de Madrid
Lancaster University
RAS - Saint Petersburg Nuclear Physics Institute
Mohammed V University in Rabat
Autonomous University of Barcelona
Ohio State University
Sorbonne Université
Tufts University
University of Göttingen
Tomsk State University
University of Freiburg
Gaziantep University
Bahcesehir University
Stony Brook University
University College London
Carleton University
National and Kapodistrian University of Athens
Moscow Engineering Physics Institute
University of Hassan II Casablanca
National Center for Energy, Nuclear Science and Technology
Université Grenoble Alpes
University of Arizona
University of Massachusetts
Stockholm University
Oskar Klein Centre
University of Manchester
University of Pittsburgh
Humboldt University of Berlin
University of Pisa
Technische Universität Dresden
Boston University
Pontificia Universidad Católica de Chile
Lomonosov Moscow State University
Institute for High Energy Physics
The University of Hong Kong
Hong Kong University of Science and Technology
Institute for High Energy Physics
Universidad de Buenos Aires
University of Johannesburg
University of Texas at Arlington
Tokyo Metropolitan University
Universidad Técnica Federico Santa Maria
Slovak Academy of Sciences
University of Bergen
University of Oslo
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Academia Sinica - Institute of Physics
SUNY Albany
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Charles University
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Roma Tre University
Universidade Federal de Juiz de Fora
Harvard University
Chinese University of Hong Kong
Tbilisi State University
University of Naples Parthenope
Iowa State University
Nanjing University
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Institute of Particle Physics
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National Tsing Hua University
Aristotle University of Thessaloniki
Czech Academy of Sciences
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University of Ljubljana
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University of Udine
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University of Alberta
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Peter the Great St. Petersburg Polytechnic University
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Justus Liebig University Giessen
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Southern Methodist University
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King's College London
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Nagoya University
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Georgian National Academy of Sciences
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KTH Royal Institute of Technology
Kyushu University
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Istanbul Aydin University
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Universidad Antonio Nariño
Moscow Institute of Physics and Technology
Hiroshima Institute of Technology
Okayama University
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Jagiellonian University in Kraków
National Institute for Research and Development of Isotopic and Molecular Technologies
University Politehnica of Bucharest
IN2P3 - Institut National de Physique Nucléaire et de Physique Des Particules
University of Sharjah
University of Hamburg
TOBB University of Economics and Technology
Wigner Research Centre for Physics
Kyoto University of Education
Giresun Universitesi
Transilvania University of Brasov

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Abstract

This 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.

Original language	English
Article number	212301
Journal	Physical Review Letters
Volume	121
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevLett.121.212301
Publication status	Published - 19 Nov 2018

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.121.212301

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@article{ca62196ea58846eeb3c82ca7a57503a8,

title = "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",

abstract = "This 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.",

author = "\{ATLAS Collaboration\} and M. Aaboud and G. Aad and B. Abbott and O. Abdinov and B. Abeloos and Abhayasinghe, \{D. K.\} and Abidi, \{S. H.\} and Abouzeid, \{O. S.\} and Abraham, \{N. L.\} and H. Abramowicz and H. Abreu and Y. Abulaiti and Acharya, \{B. S.\} and S. Adachi and L. Adamczyk and J. Adelman and M. Adersberger and A. Adiguzel and T. Adye and Affolder, \{A. A.\} and Y. Afik and C. Agheorghiesei and Aguilar-Saavedra, \{J. A.\} and F. Ahmadov and G. Aielli and S. Akatsuka and {\AA}kesson, \{T. P.A.\} and E. Akilli and Akimov, \{A. V.\} and Alberghi, \{G. L.\} and J. Albert and P. Albicocco and \{Alconada Verzini\}, \{M. J.\} and S. Alderweireldt and M. Aleksa and Aleksandrov, \{I. N.\} and C. Alexa and T. Alexopoulos and M. Alhroob and B. Ali and G. Alimonti and J. Alison and Alkire, \{S. P.\} and C. Allaire and Allbrooke, \{B. M.M.\} and Allen, \{B. W.\} and Allport, \{P. P.\} and Connell, \{S. H.\} and N. Govender and L. Truong",

note = "Publisher Copyright: {\textcopyright} 2018 CERN. for the ATLAS Collaboration. Published by the American Physical Society under the terms of the »https://creativecommons.org/licenses/by/4.0/» 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.",

year = "2018",

month = nov,

day = "19",

doi = "10.1103/PhysRevLett.121.212301",

language = "English",

volume = "121",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "21",

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TY - JOUR

T1 - 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

AU - ATLAS Collaboration

AU - Aaboud, M.

AU - Aad, G.

AU - Abbott, B.

AU - Abdinov, O.

AU - Abeloos, B.

AU - Abhayasinghe, D. K.

AU - Abidi, S. H.

AU - Abouzeid, O. S.

AU - Abraham, N. L.

AU - Abramowicz, H.

AU - Abreu, H.

AU - Abulaiti, Y.

AU - Acharya, B. S.

AU - Adachi, S.

AU - Adamczyk, L.

AU - Adelman, J.

AU - Adersberger, M.

AU - Adiguzel, A.

AU - Adye, T.

AU - Affolder, A. A.

AU - Afik, Y.

AU - Agheorghiesei, C.

AU - Aguilar-Saavedra, J. A.

AU - Ahmadov, F.

AU - Aielli, G.

AU - Akatsuka, S.

AU - Åkesson, T. P.A.

AU - Akilli, E.

AU - Akimov, A. V.

AU - Alberghi, G. L.

AU - Albert, J.

AU - Albicocco, P.

AU - Alconada Verzini, M. J.

AU - Alderweireldt, S.

AU - Aleksa, M.

AU - Aleksandrov, I. N.

AU - Alexa, C.

AU - Alexopoulos, T.

AU - Alhroob, M.

AU - Ali, B.

AU - Alimonti, G.

AU - Alison, J.

AU - Alkire, S. P.

AU - Allaire, C.

AU - Allbrooke, B. M.M.

AU - Allen, B. W.

AU - Allport, P. P.

AU - Connell, S. H.

AU - Govender, N.

AU - Truong, L.

N1 - Publisher Copyright: © 2018 CERN. for the ATLAS Collaboration. Published by the American Physical Society under the terms of the »https://creativecommons.org/licenses/by/4.0/» 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.

PY - 2018/11/19

Y1 - 2018/11/19

N2 - This 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.

AB - This 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.

UR - https://www.scopus.com/pages/publications/85057454413

U2 - 10.1103/PhysRevLett.121.212301

DO - 10.1103/PhysRevLett.121.212301

M3 - Article

C2 - 30517793

AN - SCOPUS:85057454413

SN - 0031-9007

VL - 121

JO - Physical Review Letters

JF - Physical Review Letters

IS - 21

M1 - 212301

ER -

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

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