Search for the chiral magnetic effect at the LHC with the CMS experiment
File(s)
Published version
Author(s)
Type
Journal Article
Abstract
Searches for the chiral magnetic effect (CME) using charge-dependent azimuthal correlations with respect to event planes are presented in PbPb collisions at 5.02 TeV and pPb collisions at 5.02 and 8.16 TeV, with the CMS experiment at the LHC. The azimuthal correlations with respect to the second- and third-order event planes are explored as a function of pseudorapidity, transverse momentum, and event multiplicity, which provides new insights into the underlying background correlations. By employing an event-shape engineering technique, a linear dependence of charge-dependent correlations on the second-order anisotropy flow (ν2) is observed, and the upper limits on the ν2-independent fraction, which is directly related to the CME signal, are obtained at 95% confidence level for both pPb and PbPb collisions. These results provide strong constraints on the search for the chiral magnetic effect at LHC energies, and establish new guidelines for searches in future experiments.
Date Issued
2019-02-01
Date Acceptance
2019-01-01
Citation
Nuclear Physics A, 2019, 982, pp.527-530
ISSN
0375-9474
Publisher
Elsevier
Start Page
527
End Page
530
Journal / Book Title
Nuclear Physics A
Volume
982
Copyright Statement
© 2018 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000457515500117&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Physical Sciences
Physics, Nuclear
Physics
CME
Small Systems
Particle Correlation
Event Shape Engineering
COLLISIONS
FIELD
Publication Status
Published
Date Publish Online
2019-01-22