arXiv:nucl-th/0610051·v2·Nuclear Theory
Di-hadron and Tri-hadron correlation and Mach-like cone structure
Y. G. Ma🇨🇳 · G.L. Ma🇨🇳 · S. Zhang🇨🇳 · X.Z. Cai🇨🇳 · J.H. Chen🇨🇳 · Z.J. He🇨🇳 · H.Z. Huang🇨🇳 · J.L. Long🇨🇳 · W.Q. Shen🇨🇳 · X.H. Shi🇨🇳 · J.X. Zuo🇨🇳
Abstract
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 = 200 GeV/ 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.
Comments: Proceeding of "22nd Winter Workshop onn Nuclear Dynamics", La Jolla, California, USA. March 11-18, 2006; to be published in "Heavy Ion Physics"; 8 pages, 5 figures; a couple of sentences were improved & the references were updated