Probing the chiral magnetic wave with charge-dependent flow measurements in Pb-Pb collisions at the LHC
The ALICE collaboration. (2023). Probing the chiral magnetic wave with charge-dependent flow measurements in Pb-Pb collisions at the LHC. Journal of High Energy Physics, 2023, Article 67. https://doi.org/10.1007/JHEP12(2023)067
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Journal of High Energy PhysicsAuthors
Date
2023Copyright
© Copyright CERN,
for the beneft of the ALICE Collaboration.
Article funded by SCOAP3
The Chiral Magnetic Wave (CMW) phenomenon is essential to provide insights into the strong interaction in QCD, the properties of the quark-gluon plasma, and the topological characteristics of the early universe, offering a deeper understanding of fundamental physics in high-energy collisions. Measurements of the charge-dependent anisotropic flow coefficients are studied in Pb-Pb collisions at center-of-mass energy per nucleon-nucleon collision √sNN= 5.02 TeV to probe the CMW. In particular, the slope of the normalized difference in elliptic (v2) and triangular (v3) flow coefficients of positively and negatively charged particles as a function of their event-wise normalized number difference, is reported for inclusive and identified particles. The slope rNorm3 is found to be larger than zero and to have a magnitude similar to rNorm2, thus pointing to a large background contribution for these measurements. Furthermore, rNorm2 can be described by a blast wave model calculation that incorporates local charge conservation. In addition, using the event shape engineering technique yields a fraction of CMW (fCMW) contribution to this measurement which is compatible with zero. This measurement provides the very first upper limit for fCMW, and in the 10-60% centrality interval it is found to be 26% (38%) at 95% (99.7%) confidence level.
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Springer NatureISSN Search the Publication Forum
1126-6708Publication in research information system
https://converis.jyu.fi/converis/portal/detail/Publication/243778924
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Related funder(s)
Research Council of Finland; European CommissionFunding program(s)
Centre of Excellence, AoF; RIA Research and Innovation Action, H2020
The content of the publication reflects only the author’s view. The funder is not responsible for any use that may be made of the information it contains.
Additional information about funding
European Research Council, Strong 2020 — Horizon 2020 (grant nos. 950692, 824093), European Union; Academy of Finland (Center of Excellence in Quark Matter) (grant nos. 346327, 346328), Finland.License
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