论文标题
从随机流体动力学中的异荷碰撞中的手性磁效应
Chiral Magnetic Effect in Isobar Collisions from Stochastic Hydrodynamics
论文作者
论文摘要
我们研究了s = 200GEV的AUAU，RURU和ZRZR碰撞中的手性磁效应。轴向电荷的演化是用随机流体动力学建模的，并用蒙特卡洛·格劳伯（Monte Carlo Glauber）模型计算几何量。通过调整磁场的松弛时间，我们发现我们的结果与背景相同能量的AUAU碰撞的数据非常吻合。我们还对RURU和ZRZR碰撞进行了预测。我们发现初始手性失衡的中心性依赖性弱，这意味着手性磁效应信号的中心性依赖性主要来自磁场和体积因子的中心性依赖性。我们的结果还显示了对系统尺寸的意外依赖性：虽然AUAU的系统具有较大的手性失衡和磁场，但由于较大的体积抑制因子，事实证明，它具有较小的手性磁效应信号。
We study chiral magnetic effect in collisions of AuAu, RuRu and ZrZr at s = 200GeV. The axial charge evolution is modeled with stochastic hydrodynamics and geometrical quantities are calculated with Monte Carlo Glauber model. By adjusting the relaxation time of magnetic field, we find our results in good agreement with background subtracted data for AuAu collisions at the same energy. We also make prediction for RuRu and ZrZr collisions. We find a weak centrality dependence of initial chiral imbalance, which implies the centrality dependence of chiral magnetic effect signal comes mainly from those of magnetic field and volume factor. Our results also show an unexpected dependence on system size: while the system of AuAu has larger chiral imbalance and magnetic field, it turns out to have smaller signal for chiral magnetic effect due to the larger volume suppression factor.
