发表机构
Wuhan University of Science and Technology; Central China Normal University（武汉科技大学; 华中师范大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
基于LHC轻离子碰撞数据，利用次领头阶微扰QCD模型系统研究O+O至Pb+Pb碰撞的喷注淬灭，揭示系统尺寸依赖性并表明最小系统中也形成QGP。
AI 中文摘要
高能重离子碰撞中单举强子抑制为夸克-胶子等离子体（QGP）中的部分子能量损失和喷注输运系数提供了灵敏的探针。喷注淬灭的系统尺寸依赖性可以进一步约束喷注淬灭动力学和部分子能量损失。受大型强子对撞机（LHC）上轻离子碰撞最新实验的启发，我们对LHC能量下的O+O、Ne+Ne、Xe+Xe和Pb+Pb碰撞中的单举强子抑制进行了系统性研究。计算在次领头阶微扰QCD模型框架内进行，该模型包含了核修正的初态部分子分布、高阶扭曲方法中的末态部分子能量损失，以及基于相对论重离子对撞机（RHIC）和LHC先前实验数据贝叶斯分析得到的喷注输运系数$\hat q/T^3$的温度依赖性。我们的模型计算能够同时描述O+O、Ne+Ne、Xe+Xe和Pb+Pb碰撞中在广泛的事件中心度范围以及最小偏差事件中测得的单举带电强子$R_{AA}$。我们进一步通过比值$R_{\mathrm{NeNe}}/R_{\mathrm{OO}}$以及作为$\langle N_{\mathrm{coll}} \rangle$函数的修正因子$R_{AA}$来说明喷注淬灭的系统尺寸依赖性，这些量在固定$p_{\rm T}$下表现出共同的行为，表明即使在最小的碰撞系统中也形成了QGP。
英文摘要
Single inclusive hadron suppression in high-energy heavy-ion collisions provides a sensitive probe of parton energy loss and jet transport coefficient in quark-gluon plasma (QGP). System size dependence of jet quenching can provide further constraints on the dynamics of jet quenching and parton energy loss. Motivated by recent experiments on light-ion collisions at the Large Hadron Collider (LHC), we perform a systematic study of single-inclusive hadron suppression in O+O, Ne+Ne, Xe+Xe and Pb+Pb collisions at the LHC energies. The calculations are carried out within the next-to-leading-order perturbative QCD model, incorporating the nuclear modified initial-state parton distributions, final-state parton energy loss in the higher-twist approach and the temperature dependence of the jet transport coefficient $\hat q/T^3$ from the Bayesian analyses of previous experimental data at the Relativistic Heavy-ion Collider (RHIC) and LHC. Our model calculations can simultaneously describe the measured single-inclusive charged hadron $R_{AA}$ in O+O, Ne+Ne, Xe+Xe and Pb+Pb collisions over a broad range of event centralities and in the minimum-bias events. We further illustrate the system size dependence of jet quenching through the ratio $R_{\mathrm{NeNe}}/R_{\mathrm{OO}}$ and the modification factors $R_{AA}$ as a function of $\langle N_{\mathrm{coll}} \rangle$ which follow a common behavior at fixed $p_{\rm T}$, indicating the formation of QGP even in the smallest collision systems.
Comments6 pages, 5 figures
