Energy loss of heavy and light quarks in holographic magnetized background
Energy loss of heavy and light quarks in holographic magnetized background
复制标题
全息磁化背景中重夸克和轻夸克的能量损失
DOI：
10.1103/physrevd.99.126001
复制
发表时间：
2019-01
影响因子：
5
通讯作者：
Yang Zhong
中科院分区：
文献类型：
--
作者：
Zhou-Run Zhu;Sheng-Qin Feng（通讯作者）;Ya-Fei Shi;Yang Zhong
本文利用$AdS/CFT $对应，系统地研究了RHIC和LHC能区重夸克的曳力、扩散系数、喷注猝灭参数和轻夸克的射弦能量损失对磁场依赖性的全息效应.这项研究的动机是一个强磁场和喷流淬灭的现象，这已被发现在相对论重离子碰撞。探头的运动方向与磁场方向$B$垂直和平行。当垂直于磁场方向移动时，磁场对能量损失的影响大于平行于磁场方向移动时，这意味着磁场在横向方向上移动时比在平行方向上移动时倾向于抑制更多的夸克和喷流。发现扩散系数随横向磁场的增大而减小，但随平行方向磁场的增大而增大，这表明夸克在平行于磁场方向运动时可能扩散得更远。我们还发现，磁场会增加轻夸克在横向运动时的能量损失。
We systematically study holographic effects on the magnetic field dependence of the drag force, diffusion coefficient, jet quenching parameter of heavy quarks, and the shooting string energy loss of light quarks in the RHIC and LHC energy regions by using the $\mathrm{AdS}/\mathrm{CFT}$ correspondence in this paper. This study is motivated by the phenomena of a strong magnetic field and jet quenching, which have been found in relativistic heavy ion collisions. The probe's direction of motion is perpendicular and parallel to the direction of magnetic field $B$. The effects of a magnetic field on energy loss when moving perpendicular to the magnetic field direction are larger than moving parallel to the magnetic field direction, which implies that the magnetic field tends to suppress more quarks and jets when moving in the transverse direction than in the parallel direction. It is found that the diffusion coefficient decreases with the magnetic field in the transverse direction, but increases with the magnetic field in the parallel direction, which indicates that the quark may diffuse farther when moving parallel to the magnetic field direction. We also find that the magnetic field will enhance the energy loss of the light quarks when moving in the transverse direction than in the parallel direction.
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