论文标题
使用颜色字符串渗透模型在大型强子对撞机上以$ pp $，$ p $ -pb，XE-XE和PB-PB碰撞形成的物质的热力学和运输特性
Thermodynamic and Transport Properties of Matter Formed in $pp$, $p$-Pb, Xe-Xe and Pb-Pb Collisions at the Large Hadron Collider using Color String Percolation Model
论文作者
论文摘要
为了更好地理解超相关碰撞中形成的物质，使用颜色字符串渗透模型（CSPM），我们估计了初始能量密度，平均自由路径，声音的平方速度，剪切粘度速度，熵密度比率（$η/s $），散装粘度与entropy密度和$ pp-$ $ pp-$ pp-pp，$ pp-pp，$ pp-pp，$ pp-p。大型强子对撞机（LHC）的碰撞。这些可观察物的研究是最终带电的粒子多重密度和初始状态渗透温度的函数。将这项工作的结果与众所周知的QCD模型的结果以及日常生活中的物质运输特性进行了比较。这些可观察的事物使我们能够得出关于LHC高能碰撞中形成的问题的一系列重要发现。这项工作给出了带电的粒子多重性$ \ langle dn_ {ch}/dη\ rangle \ simeq $ 20的阈值，之后有迹象表明系统动力学的变化。观察到具有晶格QCD估计的临界初始能量密度和温度是针对具有最终状态多样性的事件来实现的 等离子体。这使LHC高杂质$ pp $碰撞事件是搜索QGP液滴的可能候选人。
To have a better understanding of the matter formed in ultra-relativistic collisions, using the Color String Percolation Model (CSPM), we have estimated initial energy density, mean free path, squared speed of sound, shear viscosity to entropy density ratio ($η/s$), bulk viscosity to entropy density ratio and bulk modulus for $pp$, $p$-Pb, Xe-Xe and Pb-Pb collisions at the Large Hadron Collider (LHC). These observables are studied as a function of final state charged particle multiplicity density and initial state percolation temperature. The results from this work are compared with the results from well known QCD models and with the transport properties of matter found in day-to-day life. These observables allow us to conclude an array of important findings about the matter formed in high energy collisions at the LHC. This work gives a threshold of charged particle multiplicity $\langle dN_{ch}/dη\rangle \simeq$ 20, after which there are indications of change in the dynamics of the systems. The critical initial energy density and temperature as estimated by lattice QCD, are observed to be achieved for events with final state multiplicity $\langle dN_{ch}/dη\rangle \geq$ 20. In addition, for these high-multiplicity events, the estimated $η/s$ are comparable with that is observed for heavy-ion collisions, which is an indication of a strongly coupled Quark Gluon Plasma. This makes LHC high-multiplicity $pp$ collision events as probable candidates for the search of QGP droplets.
