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Nuclear Experiment

arXiv:1512.05739 (nucl-ex)
[Submitted on 17 Dec 2015 (v1), last revised 24 May 2016 (this version, v2)]

Title:Charge-dependent flow and the search for the Chiral Magnetic Wave in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV

Authors:ALICE Collaboration
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Abstract:We report on measurements of a charge-dependent flow using a novel three-particle correlator with ALICE in Pb-Pb collisions at the LHC, and discuss the implications for observation of local parity violation and the Chiral Magnetic Wave (CMW) in heavy-ion collisions. Charge-dependent flow is reported for different collision centralities as a function of the event charge asymmetry. While our results are in qualitative agreement with expectations based on the CMW, the nonzero signal observed in higher harmonics correlations indicates a possible significant background contribution. We also present results on a differential correlator, where the flow of positive and negative charges is reported as a function of the mean charge of the particles and their pseudorapidity separation. We argue that this differential correlator is better suited to distinguish the differences in positive and negative charges expected due to the CMW and the background effects, such as local charge conservation coupled with strong radial and anisotropic flow.
Comments: 22 pages, 10 captioned figures, authors from page 16, published version, figures at this http URL
Subjects: Nuclear Experiment (nucl-ex)
Report number: CERN-PH-EP-2015-316
Cite as: arXiv:1512.05739 [nucl-ex]
  (or arXiv:1512.05739v2 [nucl-ex] for this version)
  https://doi.org/10.48550/arXiv.1512.05739
Journal reference: Phys. Rev. C 93 (2016) 044903
Related DOI: https://doi.org/10.1103/PhysRevC.93.044903

Submission history

From: Alice Publications [view email] [via Alice Collaboration as proxy]
[v1] Thu, 17 Dec 2015 19:43:36 UTC (230 KB)
[v2] Tue, 24 May 2016 06:59:20 UTC (274 KB)
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