arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0910.3016hep-phnucl-exnucl-th
收藏

重味和轻味喷射淬灭的pQCD-based描述

A pQCD-based description of heavy and light flavor jet quenching

Guang-You Qin, Abhijit Majumder

摘要:

我们提出了一个成功的描述轻,重味喷注的介质修改内微扰QCD(pQCD)为基础的方法。只有涉及硬部分子的耦合被假定为弱耦合。硬部分子上的介质的效果,每单位时间,编码在三个非微扰,相关的输运系数,描述横向动量平方获得,弹性能量损失和扩散的弹性能量转移。一个合适的中心依赖性的抑制和领先的强子的方位角各向异性倾向于支持重夸克的输运系数稍大。基于首阶(LO)硬热回路(HTL)有效理论施加额外的约束,导致拟合恶化。

英文摘要:

We present a successful description of the medium modification of light and heavy flavor jets within a perturbative QCD (pQCD) based approach. Only the couplings involving hard partons are assumed to be weak. The effect of the medium on a hard parton, per unit time, is encoded in terms of three non-perturbative, related transport coefficients which describe the transverse momentum squared gained, the elastic energy loss and diffusion in elastic energy transfer. A fit of the centrality dependence of the suppression and the azimuthal anisotropy of leading hadrons tends to favor somewhat larger transport coefficients for heavy quarks. Imposing additional constraints based on leading order (LO) Hard Thermal Loop (HTL) effective theory, leads to a worsening of the fit.

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。

↑