# Quark Matter 2019 - the XXVIIIth International Conference on Ultra-relativistic Nucleus-Nucleus Collisions

3-9 November 2019
Wanda Reign Wuhan Hotel
Asia/Shanghai timezone

## Sensitivity analysis of the chiral magnetic effect observables using a multiphase transport model

4 Nov 2019, 17:40
20m
Wanda Han Show Theatre & Wanda Reign Wuhan Hotel

#### Wanda Han Show Theatre & Wanda Reign Wuhan Hotel

Poster Presentation Quark matter and nuclear astrophysics

### Speaker

Ling Huang (Shanghai Institute of Applied Physics)

### Description

The chiral magnetic effect is a good observable to investigate the topological and electromagnetic properties of the QGP. But the $\gamma$ correlator, a common observable used to detect the CME, contains both contribution from the CME and its background. This observable can not identify the CME from its background. Recently, a new observable of $R_{\Psi_{m}}$ has been proposed[1-4], which is expected to distinguish the CME from the background. We apply mixing particles method and shuffling particles method to calculate $R_{\Psi_{m}}$ using a multiphase transport model without or with a percentage of CME-induced charge separation[5,6]. From the results, we found that the shape of final $R_{\Psi_{2}}$ distribution is flat for the case without CME[7], but concave for that with some amount of the CME. By comparing the responses of $R_{\Psi_{2}}$ and $\gamma$ to the strength of the CME, we found that the CME signal can survive only when the initial charge separation percentage is large enough (more than $5\%$), which indicates a nonlinear sensitivity of these observables to the CME due to strong final state interactions.

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[2]N. Magdy, S. Z. Shi, J. F. Liao, N. Ajitanand, R. A. Lacey, Phys. Rev. C 97. 061901 (2018), [arXiv:1710.01717].

[3]Y. C. Feng, J. Zhao, F. Q. Wang, Phys. Rev. C 98. 034904 (2018), [arXiv:1803.02860].

[4]P. Bo$\mathrm{\dot{z}}$ek, Phys. Rev. C 97. 034907 (2018), [arXiv:1711.02563].

[5]G. L. Ma, B. Zhang, Phys. Lett. B 700. 39 (2011), [arXiv:1101.1701 [nucl-th]].

[6]L. Huang, C. W. Ma, G. L. Ma, Phys. Rev. C 97. 034909 (2018), [arXiv:1711.00637].

[7]L. Huang, M. W. Nie, G. L. Ma, [arXiv:1906.11631].

### Primary author

Ling Huang (Shanghai Institute of Applied Physics)

### Co-authors

Prof. Guo-Liang Ma (Fudan University) Dr Mao-Wu Nie (Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao, 266237, China)