^{1,2}

^{3,1}

^{*}

^{3,1}

^{†}

glma@fudan.edu.cn

mayugang@fudan.edu.cn

^{3}.

We investigate the properties of electromagnetic fields in isobaric

Lattice QCD calculations predicted that quarks and gluons are deconfined with their partonic degrees of freedom under the condition of high temperatures or the high baryon chemical potential, i.e., the formation of quark-gluon plasma (QGP). Relativistic heavy ion collisions are believed to be able to reach the condition of creating the QGP. On the other hand, a nonzero axial charge density of the QGP with a large magnetic-field

To measure the CME signal, people usually measure charge azimuthal correlation

However, the current main difficulty of measuring the CME signal is some backgrounds which we do not understand clearly

If there are similar or even the same backgrounds in two isobaric collisions, the difference of the CME observable between two isobaric collisions is expected to be mainly due to the differences from the squared magnetic field and the correlation between magnetic-field direction

The paper is organized as follows. In Sec.

In this paper, we take advantage of a AMPT model

For modeling

Following Refs.

We calculate the participant plane

Following Refs.

Figure

The spatial distributions of the electromagnetic fields on the transverse plane at

Figure

The electromagnetic fields at

The electromagnetic fields at

The electromagnetic fields at

The electromagnetic fields at

Figure

The magnetic field at

The relative ratio of the magnetic field as functions of (a) impact parameter

As the chiral anomalous effects always occur either along or perpendicular to the magnetic-field direction, it is important to find an experimental way to determine the direction of the magnetic field. With the help of finite correlation between

The event-by-event histograms of

The event-by-event histograms of

The scatter plots on the

The scatter plots on the

Figure

The correlation

The relative ratio of

Figure

The correlation

The relative ratio of

The previous subsection shows the results from the correlation between magnetic field and participant plane

Figure

The correlation

In the same way, we also take the relative ratio between

The relative ratio of

Figure

The correlation

The relative ratio of

Figure

The relative ratios of (a)

To summarize, we have utilized the AMPT model to investigate the properties of electromagnetic fields in isobaric

We thank X.-G. Huang, Z.-W. Lin, Q.-Y. Shou, Z. Tu, and F. Wang for their helpful discussions and comments. This work was supported by the National Natural Science Foundation of China under Grants No. 11890714, No. 11835002, No. 11421505, No. 11522547, and No. 11375251, the Key Research Program of the Chinese Academy of Sciences under Grant No. XDPB09. X.-L.Z. was supported by the Chinese Government Scholarship of Chinese Scholarship Council under CSC Grant No. 201804910796.