Probing the chiral magnetic wave in p Pb and PbPb collisions at √ s NN = 5.02 TeV using charge-dependent azimuthal anisotropies
Name
PhysRevC.100.064908.pdf
Description
Published version
Size
1009.89 KB
Format
Unknown
Checksum (MD5)
508a19c62fbd3ede9976510518b1a033
Author(s)
The CMS Collaboration
Abercrombie, Daniel Robert
Allen, Branden
Azzolini, Virginia
Barbieri, Richard Alexander
Baty, Austin Alan
Bi, Ran
Brandt, Stephanie Akemi
Busza, Wit
Cali, Ivan Amos
Date Issued
2019
Journal
Physical Review C
Publisher
American Physical Society (APS)
Version
Final published version
Abstract
© 2019 CERN, for the CMS Collaboration. Charge-dependent anisotropy Fourier coefficients (νn) of particle azimuthal distributions are measured in pPb and PbPb collisions at √SNN = 5.02 TeV with the CMS detector at the LHC. The normalized difference in the second-order anisotropy coefficients (ν2) between positively and negatively charged particles is found to depend linearly on the observed event charge asymmetry with comparable slopes for both pPb and PbPb collisions over a wide range of charged particle multiplicity. In PbPb, the third-order anisotropy coefficient ν3 shows a similar linear dependence with the same slope as seen for ν2. The observed similarities between the ν2 slopes for pPb and PbPb, as well as the similar slopes for ν2 and ν3 in PbPb, are compatible with expectations based on local charge conservation in the decay of clusters or resonances, and constitute a challenge to the hypothesis that, at LHC energies, the observed charge asymmetry dependence of ν2 in heavy ion collisions arises from a chiral magnetic wave.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Massachusetts Institute of Technology. Department of Aeronautics and Astronautics
Terms of Use
Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PHYSREVC.100.064908
