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arXiv 2107.00029hep-phnucl-th
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重离子碰撞中因子化喷注观测量的辐射修正

Radiative corrections for factorized jet observables in heavy ion collisions

Varun Vaidya

AI总结:

本文基于开放量子系统与有效场论方法,研究了重离子碰撞中喷注子结构观测量的因子化截面重整化,推导了介质结构函数的RG方程,并首次给出了重求和对喷注平均自由程影响的数值结果。

摘要:

我研究了重离子碰撞中喷注子结构观测量的因子化截面内,介质结构函数与介质诱导喷注函数的重整化。这基于 \cite{Vaidya:2020lih} 发展的理论体系,该体系结合开放量子系统方法与有效场论(EFT)处理前向散射,推导出适用于喷注观测量的因子化公式,这些观测量可作为长寿命稀薄夸克胶子等离子体(QGP)介质的硬探针。我证明了捕获 QGP 中与观测量无关物理的普适介质结构函数,由于介质诱导轫致辐射,同时出现了紫外和快度反常量纲。得到的重整化群(RG)方程分别对应 BFKL 方程和 QCD 耦合的跑动。我展示了使用这些 RG 方程进行重求和对介质中喷注平均自由程数值影响的首批结果。我还简要讨论了将此体系扩展至短寿命稠密介质的前景。

英文摘要:

I look at the renormalization of the medium structure function and a medium induced jet function in a factorized cross section for jet substructure observables in Heavy Ion collisions. This is based on the formalism developed in \cite{Vaidya:2020lih}, which uses an Open quantum system approach combined with the Effective Field Theory(EFT) for forward scattering to derive a factorization formula for jet observables which work as hard probes of a long lived dilute Quark Gluon Plasma(QGP) medium. I show that the universal medium structure function that captures the observable independent physics of the QGP has both UV and rapidity anomalous dimensions that appear due to medium induced Bremsstrahlung. The resulting Renormalization Group(RG) equations correspond to the BFKL equation and the running of the QCD coupling respectively. I present the first results for the numerical impact of resummation using these RG equations on the mean free path of the jet in the medium. I also briefly discuss the prospects of extending this formalism for a short lived dense medium.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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