发表机构
Instituto Galego de Fisica de Altas Enerxias (IGFAE), Universidade de Santiago de Compostela; Axencia Galega de Innovación (GAIN), Xunta de Galicia（加利西亚高能物理研究所，圣地亚哥-德孔波斯特拉大学; 加利西亚创新署，加利西亚自治区政府）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该工作提出一个虚度分辨的喷注传播框架，通过因式分解定义介质中喷注函数，扩展BDMPS-Z形式，并识别介质形成时间与喷注形成时间之比为关键控制变量。
AI 中文摘要
我们开发了一个新框架，利用微扰技术对重离子碰撞中的喷注传播进行虚度分辨的描述。通过首先推导出定义介质中喷注函数的因式分解喷注截面，严格确定了虚度的作用。这一新定义允许将通常的BDMPS-Z形式扩展，以包含虚度微分的横向动量展宽分布和介质诱导的软胶子谱。我们研究了硬碰撞后延迟时间$\ au_0$产生的介质以及$\ au_0\ o 0$的情况。对整个虚度范围的积分恢复了标准BDMPS-Z结果，而有限虚度揭示了类真空演化与介质诱导动力学之间的相互作用。我们确定介质形成时间与喷注形成时间之比为控制哪些初始虚度对喷注函数有显著贡献的变量。
英文摘要
We develop a new framework to perform a virtuality-resolved description of jet propagation in heavy-ion collisions using perturbative techniques. The role of virtuality is rigorously identified by first deriving a factorized jet cross section that defines an in-medium jet function. This new definition allows to extend the usual BDMPS-Z formalism to include the virtuality-differential transverse momentum broadening distribution and medium-induced soft gluon spectrum. We study both the cases of a medium which is created with some delay time $τ_0$ after the hard collision as well as the case in which $τ_0\to 0$. Integration over the complete virtuality range recovers the standard BDMPS-Z results, while finite virtuality reveals the interplay between vacuum-like evolution and medium-induced dynamics. We identify the ratio between the medium formation time and the jet formation time as the variable controlling which initial virtualities contribute appreciably to the jet function.
Comments60 pages, 12 figures
