Observation of Charge-Dependent Azimuthal Correlations in p-Pb Collisions and Its Implication for the Search for the Chiral Magnetic Effect
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PhysRevLett.118.122301.pdf
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374.44 KB
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Author(s)
CMS Collaboration
Abercrombie, Daniel Robert
Allen, Brandon Leigh
Apyan, Aram
Barbieri, Richard Alexander
Baty, Austin Alan
Bi, Ran
Bierwagen, Katharina
Brandt, Stephanie Akemi
Busza, Wit
Date Issued
March 2017
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Khachatryan, V. et al. “Observation of Charge-Dependent Azimuthal Correlations in p−Pb Collisions and Its Implication for the Search for the Chiral Magnetic Effect.” Physical Review Letters 118, 12 (March 2017): 122301 © 2017 CERN, for the CMS Collaboration
Version
Final published version
Abstract
Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Charge-dependent azimuthal particle correlations with respect to the second-order event plane in p-Pb and PbPb collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV have been studied with the CMS experiment at the LHC. The measurement is performed with a three-particle correlation technique, using two particles with the same or opposite charge within the pseudorapidity range |η| < 2.4, and a third particle measured in the hadron forward calorimeters (4.4 < |η| < 5). The observed differences between the same and opposite sign correlations, as functions of multiplicity and η gap between the two charged particles, are of similar magnitude in p-Pb and PbPb collisions at the same multiplicities. These results pose a challenge for the interpretation of charge-dependent azimuthal correlations in heavy ion collisions in terms of the chiral magnetic effect.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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Creative Commons Attribution 3.0 Unported license
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DOI of Published Version
https://doi.org/10.1103/PHYSREVLETT.118.122301
