HYDRO-PACIAE, a hydrodynamic and transport hybrid model for ultra-relativistic heavy ion collisions

• Published in: Journal of physics. G, Nuclear and particle physics Nuclear and particle physics, 2013-02, Vol.40 (2), p.25102-15
• Main Authors: Yan, Yu-Liang, Cheng, Yun, Zhou, Dai-Mei, Dong, Bao-Guo, Cai, Xu, Sa, Ben-Hao, Csernai, Laszlo P
• Format: Article
• Language: English
• Subjects: Atomic collisions; Collisions; Computational fluid dynamics; Fluid flow; Lead (metal); Mathematical models; Phase transformations; Transport
• ISSN: 0954-3899; 1361-6471
• DOI: 10.1088/0954-3899/40/2/025102

Combining the particle in cell hydrodynamic model and the PACIAE transport model, we present the HYDRO-PACIAE hybrid model and then use it to investigate, as an example, the charged particle production in the Au + Au collisions at = 130 GeV and the Pb + Pb collisions at = 2.76 TeV. The calculated charged particle pseudo-rapidity distribution and transverse momentum distribution reproduce the corresponding experimental data. The experimental data of the elliptic flow parameter may also be explained. The HYDRO-PACIAE model is able to describe most features of the ultra-relativistic heavy ion collisions at RHIC and LHC energies, while it describes rapid non-equilibrium hadronization (freeze out) and allows for supercooled quark-gluon plasma. This is a feature not used in other hybrid models, which assume a phase transition via a mixed phase, phase equilibrium and/or 'crossover'.