论文标题
重离子碰撞的横向动量差异分析
A transverse momentum differential global analysis of Heavy Ion Collisions
论文作者
论文摘要
对重离子碰撞及其夸克 - 杜伦等离子体形成的理解需要大量实验数据中丰富的物理学相互作用。在这项工作中，我们比较了鉴定粒子的横向动量依赖性，而PBPB和$ p $ pb碰撞的产率和各向异性流量系数也是如此。我们在全球模型拟合中进行此操作，包括一个免费的流液动力学阶段，具有可变速度$ v_ \ text {fs} $，从而扩大了初始条件的范围。在流体动力阶段，我们改变了三个二阶传输系数。自由流速度的偏好略低于光速。在此扩展模型中，大容量粘度很小，甚至与零一致。
The understanding of heavy ion collisions and its quark-gluon plasma formation requires a complicated interplay of rich physics in a wealth of experimental data. In this work we compare for identified particles the transverse momentum dependence of both the yields and the anisotropic flow coefficients for both PbPb and $p$Pb collisions. We do this in a global model fit including a free streaming prehydrodynamic phase with variable velocity $v_\text{fs}$, thereby widening the scope of initial conditions. During the hydrodynamic phase we vary three second order transport coefficients. The free streaming velocity has a preference slightly below the speed of light. In this extended model the bulk viscosity is small and even consistent with zero.
