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

被引：2
|
作者：
Wang, Xin-Nian [1 ,3 ]
Li, Han-Lin [1 ]
Liu, Fu-Ming [1 ]
Ma, Guo-Liang [2 ]
Zhu, Yan [1 ]
机构：
[1] Hua Zhong Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China
[2] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China
[3] Univ Calif Berkeley, Lawrence Berkeley Lab, Nucl Sci Div MS 70R0319, Berkeley, CA 94720 USA
来源：
NUCLEAR PHYSICS A | 2011年 / 855卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Jet; gamma-jet; Mach cone; dihadron; hot spot; harmonic flow; FLOW;
D O I：
10.1016/j.nuclphysa.2011.02.108
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
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 gamma-hadron correlation has similar double-peak feature but is free of the contributions from harmonic flow and hot spots. Dihadron and gamma-hadron correlations are compared to shed light on jet-induced medium excitation and hot spots in an expanding medium.
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页码：469 / 472
页数：4
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