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arXiv · 1012.2584

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
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Abstract

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.

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Han-Lin Li, Fu-Ming Liu, Guo-Liang Ma, Xin-Nian Wang, Yan Zhu. 2010-12-12. Dihadron and gamma-hadron correlations from jet-induced medium excitation in high-energy heavy-ion collisions. https://arxiv.org/abs/1012.2584

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