基于横向动量关联的剪切粘度估算
Estimation of shear viscosity based on transverse momentum correlations
摘要：
RHIC的事件各向异性测量表明，在重离子碰撞流中产生的强相互作用物质具有非常小的剪切粘度。精确测定“剪切粘度-熵”比是目前广泛研究的课题。本文给出了在$\sqrt{s_{NN}}$ = 200 GeV时，$Au +Au$相互作用的横向动量关联函数随碰撞中心性的演化的初步测量结果.我们比较两个差分关联函数，即{ \it包容}和差分版本的相关措施$\tilde C$介绍加文${\it et. al.}$。这些观测量可用于单位熵剪切粘度的实验研究。
英文摘要：
Event anisotropy measurements at RHIC suggest the strongly interacting matter created in heavy ion collisions flows with very little shear viscosity. Precise determination of "shear viscosity-to-entropy" ratio is currently a subject of extensive study. We present preliminary results of measurements of the evolution of transverse momentum correlation function with collision centrality of $Au +Au$ interactions at $\sqrt{s_{NN}}$ = 200 GeV. We compare two differential correlation functions, namely {\it inclusive} and a differential version of the correlation measure $\tilde C$ introduced by Gavin ${\it et. al.}$. These observables can be used for the experimental study of the shear viscosity per unit entropy.
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