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arXiv 1606.02692nucl-thhep-ph
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核碰撞中的快度关联结构

Rapidity Correlation Structure in Nuclear Collisions

Sean Gavin, George Moschelli, Christopher Zin

摘要:

我们表明,横向动量相关的快度依赖性的测量可以用来确定的特征时间$τ_π$,支配的应力能量张量的各向同性的速率,以及剪切粘度$ν= η/sT$。我们制定的方法计算这些相关性使用二阶耗散流体动力学噪声。当前数据与$τ_π/ν\sim 10$一致,但有针对性的测量可以提高精度。

英文摘要:

We show that measurements of the rapidity dependence of transverse momentum correlations can be used to determine the characteristic time $τ_π$ that dictates the rate of isotropization of the stress energy tensor, as well as the shear viscosity $ν= η/sT$. We formulate methods for computing these correlations using second order dissipative hydrodynamics with noise. Current data are consistent with $τ_π/ν\sim 10$, but targeted measurements can improve this precision.

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