Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2006-10-11
Proc.22nd Winter Workshop on Nuclear Dynamics(2006) 47-54
Physics
Nuclear Physics
Nuclear Theory
Proceeding of "22nd Winter Workshop onn Nuclear Dynamics", La Jolla, California, USA. March 11-18, 2006; to be published in "H
Scientific paper
In a framework of a multi-phase transport model with both partonic and hadronic interactions, azimuthal correlations between trigger particles and associated scattering particles in Au + Au collisions at $\sqrt{s_{NN}}$ = 200 GeV/$c$ have been studied by the mixing-event technique. The Mach-like structure has been observed in correlation function for central collisions. It is shown that the Mach-like structure is basically born in the partonic process and further developed in hadronic rescattering process. However, hadronic rescattering alone cannot reproduce the amplitude of Mach-like cone on away side, therefore partonic cascade process is necessary to describe the amplitude of Mach-like cone on away side in experiment. In addition, three-particle correlations have been investigated in central Au + Au collisions with the AMPT model, and the results support the conclusion that partonic cascade processes enhance the opening angle of Mach-like cone structures.
Cai Xiang-Zhou
Chen Jacqueline H.
He Z. J.
Huang Huan Zhong
Long James L.
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