arXiv 0907.27122009-07hep-phnucl-th

高能核碰撞中部分子能量损失的喷流观测

Jet Observables of Parton Energy Loss in High-Energy Nuclear Collisions

Ben-Wei Zhang

备注：: Proceedings for Quark Matter 2009, updated version with minor corrections
发表信息：: Nucl.Phys.A830:259c-262c,2009
DOI：: 10.1016/j.nuclphysa.2009.10.022

摘要：

虽然强衰减的单粒子生产和粒子的相关性提供了令人信服的证据，在QGP的大部分子能量损失，其应用射流层析成像具有固有的局限性，由于测量的包容性。将这种抑制推广到全喷流观测量，导致了一种无偏的、更有差异的、因此是强有力的方法来确定高能核碰撞中产生的热QCD介质的特性。在这篇文章中，我们报告了最近的理论进展，计算喷流的形状和相关的喷流截面的存在下，QGP引起的部分子能量损失。(i)讨论了重离子碰撞中喷流内能量流动的理论模型。(ii)真实的数值模拟表明，核修改因子$R_{AA}(p_T)$不断演变的射流锥尺寸$R^{\max}$或接受切割$ω_{\min}$ -射流淬火的一个新的功能。预期的射流变宽是微妙的，并且对于较小的圆锥半径，最容易在圆锥的外围表现出来。

英文摘要：

While strong attenuation of single particle production and particle correlations has provided convincing evidence for large parton energy loss in the QGP, its application to jet tomography has inherent limitations due to the inclusive nature of the measurements. Generalization of this suppression to full jet observables leads to an unbiased, more differential and thus powerful approach to determining the characteristics of the hot QCD medium created in high-energy nuclear collisions. In this article we report on recent theoretical progress in calculating jet shapes and the related jet cross sections in the presence of QGP-induced parton energy loss. (i) A theoretical model of intra-jet energy flow in heavy-ion collisions is discussed. (ii) Realistic numerical simulations demonstrate the nuclear modification factor $R_{AA}(p_T)$ evolves continuously with the jet cone size $R^{\max}$ or the acceptance cut $ω_{\min}$ - a novel feature of jet quenching. The anticipated broadening of jets is subtle and most readily manifested in the periphery of the cone for smaller cone radii.

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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