Issue |
EPJ Web Conf.
Volume 296, 2024
30th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions (Quark Matter 2023)
|
|
---|---|---|
Article Number | 04002 | |
Number of page(s) | 4 | |
Section | Chirality | |
DOI | https://doi.org/10.1051/epjconf/202429604002 | |
Published online | 26 June 2024 |
https://doi.org/10.1051/epjconf/202429604002
Influence of globally spin-aligned vector mesons to the measurements of the chiral magnetic effect in heavy-ion collisions
1 Key Laboratory of Nuclear Physics and Ion-beam Application (MOE), Institute of Modern Physics, Fudan University, Shanghai 200433, China
2 Brookhaven National Laboratory, Upton, New York 11973
3 Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
* e-mail: dyshen@fudan.edu.cn
Published online: 26 June 2024
The chiral magnetic effect (CME) in high-energy heavy-ion collisions arises from the interplay between the chirality imbalance and the intense magnetic field and will cause a charge separation along the magnetic field direction. While the CME search is still ongoing in experiments, the non-CME contributions need to be excluded from the CME observables. In this work, we examine the influence of globally spin-aligned ρ mesons on the γ112 correlator, the RΨ2(ΔS) correlator, and the signed balance functions, via a toy model and a multiphase transport model (AMPT). We find that the CME observables are sensitive to the 00-component of the spin density matrix, ρ00: they receive positive (negative) contributions when ρ00 is larger (smaller) than 1/3.
© The Authors, published by EDP Sciences, 2024
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