论文标题
对QCD状态方程的喷射淬火和测试的完整重新召开分析
Full resummation analysis of jet quenching and tests of the QCD Equation of State
论文作者
论文摘要
喷射淬火已成为研究重离子碰撞中产生的热QCD物质的基本工具。尽管在过去的二十年中已经取得了重要的理论和实验进步，但培养基的提取以及与有限温度QCD的比较仍然特别令人担忧。在这项工作中，我们表明，在没有温度问题的情况下正确提取参数，需要改进中诱导的Gluon光谱的计算。特别是，我们采用了多个硬散射的数值实现，这些硬度散射在高斯近似之外的不透明度扩展中恢复所有术语。当与迄今为止现象学分析中最常用的两个近似值，一阶不透明度扩展和高斯近似中，我们发现提取的培养基参数的显着差异。我们还首次尝试将提取的介质参数与晶格结果进行比较。
Jet quenching has become a fundamental tool to study the hot QCD matter produced in heavy ion collisions. While important theoretical and experimental advances have been made in the last two decades, the extraction of the medium properties and the comparison with finite temperature QCD is still particularly worrisome. In this work we show that improvements in the calculation of the medium-induced gluon spectrum are required for a correct extraction of the parameters without temperature issues. In particular, we employ an improved numerical implementation of multiple hard scatterings that resums all terms in the opacity expansion beyond the Gaussian approximation. We find significant differences in the extracted medium parameters when comparing with two of the most used approximations in phenomenological analyses to date, the first order opacity expansion and the Gaussian approximation. We also make a first attempt to compare the extracted medium parameters with lattice results.
