Under the approximate chiral symmetry restoration, quark interactions with topological gluon fields in quantum chromodynamics can induce chirality imbalance and parity violation in local domains. An electric charge separation (\cs) could be generated along the direction of a strong magnetic field ($\Bbf$), a phenomenon called the chiral magnetic effect (\cme). \csmeasurements by azimuthal correlators are contaminated by major backgrounds from elliptic flow anisotropy ($\vv$). Isobaric \Ru+\Ruand \Zr+\Zrcollisions have been proposed to identify the \cme(expected to differ between the two systems) out of the backgrounds (to be almost the same). We show, by using the density functional theory calculations of the proton and neutron distributions, that these expectations may not hold as originally anticipated because the two systems may have sizable differences in eccentricity and $\vv$.

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等压线密度分布在手性磁效应搜索中的重要性

在近似的手性对称还原下，量子色动力学中夸克与拓扑胶子场的相互作用会引起局部域中的手性不平衡和奇偶性违规。沿强磁场（$ \ Bbf $）的方向可能会产生电荷分离（\ cs），这种现象称为手性磁效应（\ cme）。方位相关器的\ cs测量值受到椭圆流动各向异性（$ \ vv $）的主要背景的污染。已经提出了等压\ Ru + \ Ruand \ Zr + \ Zrcollisions来识别背景之外的\ cme（预期在两个系统之间会有所不同）（几乎相同）。通过质子和中子分布的密度泛函理论计算，我们证明了