Magnetohydrodynamics, charged currents, and directed flow in heavy ion collisions
Magnetohydrodynamics, charged currents, and directed flow in heavy ion collisions
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DOI：
10.1103/physrevc.89.054905
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发表时间：
2014-01
影响因子：
3.1
通讯作者：
U. Gursoy;D. Kharzeev;K. Rajagopal
中科院分区：
文献类型：
--
作者：
U. Gursoy;D. Kharzeev;K. Rajagopal
任何碰撞参数为非零的重离子碰撞产生的热QCD物质都产生于强磁场中。我们研究了这些场在所产生的带电强子的方位角分布和关联上留下的印记。磁场是时间依赖性的，并且介质是膨胀的，这导致由于法拉第和霍尔效应的组合而引起的带电电流的感应。我们发现，这些电流的结果在一个电荷依赖的定向流v1是奇数的速度和奇数下的电荷交换。它可以通过测量不同速度的带电强子定向流之间的相关性来检测，$\langle v_1^\pm（y_1）v_1^\pm（y_2）\rangle$。
The hot QCD matter produced in any heavy ion collision with a nonzero impact parameter is produced within a strong magnetic field. We study the imprint that these fields leave on the azimuthal distributions and correlations of the produced charged hadrons. The magnetic field is time-dependent and the medium is expanding, which leads to the induction of charged currents due to the combination of Faraday and Hall effects. We find that these currents result in a charge- dependent directed flow v1 that is odd in rapidity and odd under charge exchange. It can be detected by measuring correlations between the directed flow of charged hadrons at different rapidities, $\langle v_1^\pm(y_1)v_1^\pm(y_2)\rangle$.