论文标题
剪切粘度的多样性依赖性，等温粘度和$ pp $ collisions in $ \ sqrt {s} $ = 7 tev的声音速度
Multiplicity Dependence of Shear Viscosity, Isothermal Compressibility and Speed of Sound in $pp$ collisions at $\sqrt{s}$ = 7 TeV
论文作者
论文摘要
为了了解$ pp $碰撞中产生的系统的详细动态，必须了解状态方程（EOS）和各种热力学特性。在这项工作中，我们通过考虑差异冻结场景来研究剪切粘度与熵密度比，等温的可压缩性和系统声音速度。我们已经使用了热力学一致的Tsallis非扩展统计数据，可以更好地解释$ PP $碰撞系统的动力学。虽然剪切粘度与熵密度比提供了有关高能碰撞系统流动性量度的信息，但等温可压缩性使有关系统偏离完美流体的偏差有一个清晰的想法。系统中的声速作为$ \ langle dn _ {\ rm ch}/dη\ rangle $的函数，使我们对系统动力学的生动图片。结果表明，对高多样性$ pp $碰撞的直观观点，并给我们限制了$ \ langle dn _ {\ rm ch}/dη\ rangle $ $ $ $ $ \ gtrsim $（10-20），然后可以观察到系统动力学的更改。
In order to understand the detailed dynamics of systems produced in $pp$ collisions, it is essential to know about the Equation of State (EoS) and various thermodynamic properties. In this work, we study the shear viscosity to entropy density ratio, isothermal compressibility and speed of sound of the system by considering a differential freeze-out scenario. We have used a thermodynamically consistent Tsallis non-extensive statistics to have a better explanation for the dynamics of $pp$ collision systems. While the shear viscosity to entropy density ratio provides information about the measure of fluidity of a system formed in high energy collisions, the isothermal compressibility gives a clear idea about the deviation of the system from a perfect fluid. The speed of sound in the system as a function of $\langle dN_{\rm ch}/dη\rangle$ gives us a vivid picture of the dynamics of the system. The results show quite an intuitive perspective on high multiplicity $pp$ collisions and give us a limit of $\langle dN_{\rm ch}/dη\rangle$ $\gtrsim$ (10 - 20), after which a change in the dynamics of the system may be observed.
