论文标题
在$ \ sqrt {s} = 7 \; \ text {tev} $和p $ - $ pb碰撞时，在$ \ sqrt {s} = 7 \ sqrt {
Characterizing system dynamics with two-particle transverse momentum correlations in pp collisions at $\sqrt{s} = 7\;\text{TeV}$ and p$-$Pb collisions at $\sqrt{s_{\rm NN}} = 5.02\;\text{TeV}$
论文作者
论文摘要
最近以Pb $ - $ PB碰撞测量的两粒子微分横向动量相关器$ g_ {2} $成为一种有力的工具，可以深入了解粒子生产机制并推断传输属性，例如在PB $ -PB碰撞中产生的介质的剪切粘度与熵密度的比率。 In this poster, recent ALICE measurements of this correlator in pp collisions at $\sqrt{s}=7$ and p$-$Pb collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV are presented to search, in particular, for viscous effects expected to arise in fluid-like systems produced in these collisions.研究了相关器的强度和形状，这是产生粒子多样性的函数，以寻求纵向拓宽，这可能揭示了这些较小的系统中粘性效应的存在。与Monte Carlo模型的预测相比，还相比，测得的相关器及其从PP和P $ -PB到PB $ -PB的演变，并讨论了粘性效应的潜在存在。
The two-particle differential transverse momentum correlator $G_{2}$ recently measured in Pb$-$Pb collisions, emerged as a powerful tool to gain insight into particle production mechanisms and to infer transport properties such as the ratio of shear viscosity to entropy density of the medium created in Pb$-$Pb collisions. In this poster, recent ALICE measurements of this correlator in pp collisions at $\sqrt{s}=7$ and p$-$Pb collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV are presented to search, in particular, for viscous effects expected to arise in fluid-like systems produced in these collisions. The strength and shape of the correlator are studied as a function of produced particle multiplicity to look for longitudinal broadening that might reveal the presence of viscous effects in these smaller systems. The measured correlators and their evolution from pp and p$-$Pb to Pb$-$Pb are additionally compared to predictions from Monte Carlo models, and the potential presence of viscous effects is discussed.
