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Search for the chiral magnetic effect at the LHC with the CMS experiment

Tu, Zhoudunming and Sirunyan, AM and Tumasyan, A and Adam, W (2019) Search for the chiral magnetic effect at the LHC with the CMS experiment. In: NUCLEAR PHYSICS A, 982 . pp. 527-530.

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Official URL: https://doi.org/10.1016/j.nuclphysa.2018.08.032


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 (nu(2)) is observed, and the upper limits on the nu(2)-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.

Item Type: Journal Article
Keywords: CME; Small Systems; Particle Correlation; Event Shape Engineering
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited: 21 Mar 2019 07:34
Last Modified: 21 Mar 2019 07:34
URI: http://eprints.iisc.ac.in/id/eprint/62048

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