标题： QCD喷注在热密介质中的研究：喷注形成时间和碰撞核的分析 显示英文标题

标题： QCD jets in a hot and dense medium: a study of shower formation time and collision kernels

摘要： 使用MARTINI模型，该模型考虑在流体动力学背景下的演变QCD喷注，表明在初始硬散射后将形成时间引入部分子辐射是同时描述带电介子和喷注$R_{AA}$的关键。 这种包含也改善了小角度的喷注形状比值和领先带电介子的喷注碎片函数比值。 然后MARTINI框架旨在研究下一阶、次领头阶和非微扰碰撞核。 观察到喷注子结构观测量（即喷注形状和碎片函数）的修改存在显著差异。 这些差异是由于在介质中演化的相对软胶子的辐射率不同造成的。 显示英文摘要

摘要： With the use of MARTINI, a model which considers evolving QCD jets against a fluid dynamical background, it is shown that the introduction of formation time to the parton shower after the initial hard scattering is essential for a simultaneous description of charged hadron and jet $R_{AA}$. This inclusion also improves jet shape ratio at small angle and jet fragmentation function ratios of leading charged hadrons. The MARTINI framework is then aimed at a study of the leading order, next-to-leading-order, and non perturbative collision kernels. Sizable differences in the modification of jet substructure observables, i.e., jet shape and fragmentation functions are observed. Such differences are caused by the difference in the radiation rates of relatively soft gluons that survive in the evolution in medium.