标题： 重离子碰撞中的非线性QCD演化碰撞能量依赖性 显示英文标题

标题： Collision energy dependence in heavy ion collisions from nonlinear QCD evolution

摘要： 我们探讨了在色玻璃凝聚框架内纳入从演化方程确定的能量依赖性对超高相对论重离子碰撞可观测量的影响。这相当于将 JIMWLK 演化方程整合到 IP-Glasma 模型中，然后该模型与粘性相对论流体动力学耦合。这种方法允许在特定的 Bjorken-$x$值下系统地表示核子，这些值在碰撞的不同质心能量和最终状态粒子的快度下被探测。与传统的 IP-Glasma 模型相比，我们在多重分布和粒子谱上发现了显著影响，特别是在最高质心能量下的较小碰撞系统中。我们的结果强调了在描述不同质心能量下的重离子碰撞时，纳入非线性 QCD 演化的重要性，因为精确提取输运系数将受到影响。这项工作建立了一个稳健的框架，用于理解高能下的夸克胶子等离子体和核结构，将小-$x$物理整合到重离子碰撞的初始条件下。 显示英文摘要

摘要： We explore the effects of including the energy dependence determined from evolution equations within the color glass condensate framework on observables in ultra-relativistic heavy-ion collisions. This amounts to integrating the JIMWLK evolution equations into the IP-Glasma model, which is then coupled to viscous relativistic hydrodynamics. This methodology allows for a systematic representation of nuclei at specific Bjorken-$x$ values, which are probed at different center-of-mass energies of the collision and rapidities of final state particles. Comparing to the conventional IP-Glasma model, we find significant effects on multiplicity distributions and particle spectra, especially in smaller collision systems at the highest center of mass energies. Our results highlight the importance of incorporating nonlinear QCD evolution in the description of heavy ion collisions at varying center of mass energies, as the precise extraction of transport coefficients will be affected. This work establishes a robust framework for understanding the quark gluon plasma and nuclear structure at high energy, integrating small-$x$ physics into the initial conditions of heavy-ion collisions.