标题： 研究量子色动力学物质的电导率对电荷依赖性定向流的影响 显示英文标题

标题： Investigating the effects of QCD matter's electrical conductivity on charge dependent directed flow

摘要： 电荷依赖的定向流是相对论重离子碰撞中电磁场的一个重要可观测量。我们展示了质子和反质子之间电荷依赖的定向流差异对电阻率（即夸克-胶子等离子体电导率的倒数）的敏感性，这在不同的碰撞中心度下有所不同。我们的模型数值求解了3+1维相对论耗散磁流体力学方程，假设电导率为标量。在这项工作中，我们关注对称Au+Au碰撞在RHIC的最高能量$\sqrt{s}=200$GeV下的情况。我们展示了模型中电磁场的时间演化，并将其与电荷依赖的定向流结果联系起来。我们的结果强调了在相对论重离子碰撞中，建模夸克-胶子等离子体电导率对于电荷依赖的可观测量的重要性。 显示英文摘要

摘要： Charge dependent directed flow is an important observable of electromagnetic fields in relativistic heavy-ion collisions. We demonstrate how the difference in charge dependent directed flows between protons and antiprotons is sensitive to the resistivity, inverse of quark-gluon plasma's electric conductivity, over different collision centralities. Our model numerically solves the 3+1D relativistic resistive magneto-hydrodynamic (RRMHD) equations, assuming the electric conductivity to be a scalar. For this work, we focus on symmetric Au + Au collisions at the top RHIC energy of $\sqrt{s}=200$ GeV. We illustrate the time evolution of the electromagnetic fields in our model and connect that to the charge dependent directed flow results. Our results highlight the importance of modeling quark-gluon plasma's electric conductivity for charge dependent observables in relativistic heavy-ion collisions.