arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1012.2584nucl-thhep-ph
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高能重离子碰撞中喷注诱导介质激发的双强子和γ-强子关联

Dihadron and gamma-hadron correlations from jet-induced medium excitation in high-energy heavy-ion collisions

Han-Lin Li, Fu-Ming Liu, Guo-Liang Ma, Xin-Nian Wang, Yan Zhu

摘要:

喷流传播被证明在夸克-胶子等离子体中产生类马赫锥介质激发。然而,在高能重离子碰撞中,只有这种介质激发和喷流簇射部分子被径向流偏转才导致双峰双强子关联。在AMPT Monte Carlo模型下分别研究了谐波流、热点和双喷流的双强子关联,发现它们都导致了双强子方位角关联的双峰。$γ$ -强子关联具有相似的双峰特征,但没有谐波流和热点的贡献。双强子和$γ$强子的相关性进行了比较,揭示了射流引起的介质激发和热点在膨胀介质。

英文摘要:

Jet propagation is shown to produce Mach-cone-like medium excitation inside a quark-gluon plasma. However, only deflection of such medium excitation and jet shower partons by radial flow leads to double-peaked dihadron correlation in high-energy heavy-ion collisions. Dihadron correlations from harmonic flow, hot spots and dijets are studied separately within the AMPT Monte Carlo model and all lead to double-peaked dihadron azimuthal correlation. The $γ$-hadron correlation has similar double-peak feature but is free of the contributions from harmonic flow and hot spots. Dihadron and $γ$-hadron correlations are compared to shed light on jet-induced medium excitation and hot spots in an expanding 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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