Journal of High Energy Physics ( IF 5.0 ) Pub Date : 2021-05-06 , DOI: 10.1007/jhep05(2021)041 Weiyao Ke , Xin-Nian Wang
We study inclusive jet suppression and modifications in the quark-gluon plasma (QGP) with a transport-based model. The model includes vacuum-like parton shower evolution at high-virtuality, a linearized transport for jet-medium interactions, and a simple ansatz for the jet-induced hydrodynamic response of the medium. Model parameters are calibrated to nuclear modification factors for inclusive hadron \( {R}_{AA}^h \) and single inclusive jets \( {R}_{AA}^j \) with cone size R = 0.4 in 0–10% central Au-Au and Pb-Pb collisions measured at the RHIC and LHC. The calibrated model consistently describes the cone-size dependent \( {R}_{AA}^j \)(R), modifications to inclusive jet fragmentation functions and jet shape. We discuss the origin of these modifications by analyzing the medium-induced jet energy flow in this model and elucidate the interplay of hard parton evolution and jet-induced medium response. In particular, we demonstrate that the excess of soft hadrons at pT ∼ 2 GeV/c in jet fragmentation function and jet shape at large \( r=\sqrt{\Delta {\eta}^2+\Delta {\phi}^2} \) are consequences of both soft medium-induced gluon radiation and jet-induced medium excitation.
A preprint version of the article is available at ArXiv.中文翻译:
在校准的运输模型中对单个包容喷气机进行QGP修改
我们研究基于运输模型的夸克胶子血浆(QGP)中的包容性射流抑制和修饰。该模型包括在高虚拟度下类似真空的帕顿阵雨演变,用于喷射介质相互作用的线性运输,以及用于介质引起的射流流体动力响应的简单ansatz。模型参数已针对包含核子的修正系数,用于锥度为R = 0的包含强子\({R} _ {AA} ^ h \)和单个包含射流\({R} _ {AA} ^ j \)。在RHIC和LHC处测量的0-10%中心Au-Au和Pb-Pb碰撞中有4次发生。校准后的模型一致地描述了视锥大小而定的\({R} _ {AA} ^ j \)(R),对包含的射流破碎功能和射流形状进行了修改。我们通过分析该模型中的介质诱发的射流能量流,讨论了这些修饰的起源,并阐明了硬质子on演化与射流诱发的介质响应之间的相互作用。特别是,我们表明,在过量的软强子的p Ť 〜 2电子伏特/ ç在大型喷气破碎功能和喷射形状\(R = \ SQRT {\德尔塔{\ ETA} ^ 2 + \德尔塔{\披} ^ 2} \)是软介质诱导的胶子辐射和射流诱导的介质激发的结果。
该文章的预印本可在ArXiv上获得。