@article{67718b9ebeae481a8d0991367ad7cf81,
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 ultra-peripheral 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, {M. J.Verzini} and S. Alderweireldt and M. Aleksa and Aleksandrov, {I. N.} and C. Alexa and T. Alexopoulos and M. Alhroob and B. Ali and M. Aliev and G. Alimonti and J. Alison and Alkire, {S. P.} and C. Allaire and Allbrooke, {B. M.M.} and E. Cheu and Johns, {K. A.} and Rutherfoord, {J. P.} and Varnes, {E. W.}",
note = "Publisher Copyright: Copyright {\textcopyright} 2018, The Authors. All rights reserved. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",
year = "2018",
month = jun,
day = "22",
language = "English (US)",
journal = "Nuclear Physics A",
issn = "0375-9474",
publisher = "Elsevier",
}