A1 Journal article (refereed)
Probing the chiral magnetic wave with charge-dependent flow measurements in Pb-Pb collisions at the LHC (2023)
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
JYU authors or editors
Publication details
All authors or editors: The ALICE collaboration
Journal or series: Journal of High Energy Physics
ISSN: 1126-6708
eISSN: 1029-8479
Publication year: 2023
Publication date: 12/12/2023
Volume: 2023
Article number: 67
Publisher: Springer Nature
Publication country: Germany
Publication language: English
DOI: https://doi.org/10.1007/JHEP12(2023)067
Publication open access: Openly available
Publication channel open access: Open Access channel
Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/98382
Web address of parallel published publication (pre-print): https://doi.org/10.48550/arXiv.2308.16123
Abstract
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.
Keywords: particle physics; nuclear physics
Contributing organizations
Related projects
- The strong interaction at the frontier of knowledge: fundamental research and applications- STRONG -2020
- Lappi, Tuomas
- European Commission
- Center of Excellence in Quark Matter
- Räsänen, Sami
- Research Council of Finland
- Center of Excellence in Quark Matter
- Kim, Dong
- Research Council of Finland
Ministry reporting: Yes
VIRTA submission year: 2024
Preliminary JUFO rating: 3