3D Structure of Jet-Induced Diffusion Wake in an Expanding Quark-Gluon Plasma
3D Structure of Jet-Induced Diffusion Wake in an Expanding Quark-Gluon Plasma
复制标题
膨胀夸克-胶子等离子体中射流诱导扩散尾流的 3D 结构
DOI：
10.1103/physrevlett.130.052301
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发表时间：
2023
影响因子：
8.6
通讯作者：
Wang, Xin-Nian
中科院分区：
文献类型：
--
作者：
Yang, Zhong;Luo, Tan;Chen, Wei;Pang, Longgang;Wang, Xin-Nian
伴随射流诱导的马赫锥的扩散尾迹提供了高能重离子碰撞中夸克-胶子等离子体特性的独特探测。它的特征是软强子在与传播射流相反的方向上耗尽。在线性玻尔兹曼输运和流体耦合模型中，研究了在LHC能量碰撞中由触发射流诱导的扩散尾迹的三维结构。我们从喷气-强子相关的初始多部子相互作用（MPI）中识别出一个由脊顶扩散尾迹引起的谷状结构，它是速度和方位角的函数。这导致软强子在与射流相反方向的快速分布中出现双峰结构，作为扩散尾迹的明确信号。利用双高斯拟合，我们提取了扩散尾迹和MPI对双峰的贡献。扩散尾迹谷随着射流能量损失的增大而增大，表现为射流的不对称性。研究了其对状态方程和剪切粘度的敏感性。
The diffusion wake accompanying the jet-induced Mach cone provides a unique probe of the properties of quark-gluon plasma in high-energy heavy-ion collisions. It can be characterized by a depletion of soft hadrons in the opposite direction of the propagating jet. We explore the 3D structure of the diffusion wake induced by-triggered jets incollisions at the LHC energy within the coupled linear Boltzmann transport and hydro model. We identify a valley structure caused by the diffusion wake on top of a ridge from the initial multiple parton interaction (MPI) in jet-hadron correlation as a function of rapidity and azimuthal angle. This leads to a double-peak structure in the rapidity distribution of soft hadrons in the opposite direction of the jets as an unambiguous signal of the diffusion wake. Using a two-Gaussian fit, we extract the diffusion wake and MPI contributions to the double peak. The diffusion wake valley is found to deepen with the jet energy loss as characterized by the-jet asymmetry. Its sensitivity to the equation of state and shear viscosity is also studied.