Rapidity Correlation Structure in Nuclear Collisions
Rapidity Correlation Structure in Nuclear Collisions
复制标题
核碰撞中的快速相关结构
DOI：
10.1103/physrevc.94.024921
复制
发表时间：
2016
影响因子：
3.1
通讯作者：
C. Zin
中科院分区：
文献类型：
--
作者：
S. Gavin;G. Moschelli;C. Zin
我们证明，横向动量相关性的快速依赖性的测量可用于确定特征时间 ${\ensuremath{\tau}}_{\ensuremath{\pi}}$ ，该特征时间决定应力能张量的各向同性速率，以及剪切粘度 $\ensuremath{\nu}=\ensuremath{\eta}/sT$。我们制定了使用二阶耗散流体动力学和噪声来计算这些相关性的方法。当前数据与 ${\ensuremath{\tau}}_{\ensuremath{\pi}}/\ensuremath{\nu}\ensuremath{\sim}10$ 一致，但有针对性的测量可以提高此精度。
We show that measurements of the rapidity dependence of transverse momentum correlations can be used to determine the characteristic time ${\ensuremath{\tau}}_{\ensuremath{\pi}}$ that dictates the rate of isotropization of the stress energy tensor, as well as the shear viscosity $\ensuremath{\nu}=\ensuremath{\eta}/sT$. We formulate methods for computing these correlations using second-order dissipative hydrodynamics with noise. Current data are consistent with ${\ensuremath{\tau}}_{\ensuremath{\pi}}/\ensuremath{\nu}\ensuremath{\sim}10$, but targeted measurements can improve this precision.