强瞬态磁场中的电荷分离
Electric Charge Separation in Strong Transient Magnetic Fields
摘要：
本文讨论了相对论性重离子碰撞中发射的强子之间关于反应平面的不对称电荷涨落的产生机制。我们表明，这样的机制存在于两个，强子气体和QCD的部分子阶段。这里考虑的机制都需要强磁场（"手征磁效应“）的存在，但它们不涉及宇称或电荷宇称违反。我们分析了手征磁效应产生的局域电流涨落如何在动量空间中动态演化为末态强子间的不对称电荷分布。我们估计的幅度的事件由事件波动的最终状态电荷不对称性由于部分子和强子机制。
英文摘要：
We discuss various mechanisms for the creation of an asymmetric charge fluctuation with respect to the reaction plane among hadrons emitted in relativistic heavy-ion collisions. We show that such mechanisms exist in both, the hadronic gas and the partonic phases of QCD. The mechanisms considered here all require the presence of a strong magnetic field (the ``chiral magnetic effect''), but they do not involve parity or charge-parity violations. We analyze how a transient local electric current fluctuation generated by the chiral magnetic effect can dynamically evolve into an asymmetric charge distribution among the final-state hadrons in momentum space. We estimate the magnitude of the event-by-event fluctuations of the final-state charge asymmetry due to the partonic and hadronic mechanisms.
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