Integrated Dynamical Approach to Relativistic Heavy Ion Collisions

Details Integrated Dynamical Approach to Relativistic Heavy Ion Collisions Integrated Dynamical Approach to Relativistic Heavy Ion Collisions

2012-04-26

arxiv.org/abs/1204.5814v1

Physics

Nuclear Physics

Nuclear Theory

53 pages, 43 figures, submitted to Progress in Particle and Nuclear Physics

Scientific paper

We develop an integrated dynamical model to describe heavy ion reaction as a whole at ultrarelativistic energies. The model is composed of fully (3+1) dimensional ideal hydrodynamic simulations using the state-of-the-art equation of state from lattice QCD and subsequent hadronic cascadings in the late stage. Initial conditions are obtained employing Monte Carlo versions of the Kharzeev-Levin-Nardi model (MC-KLN) and the Glauber model (MC-Glauber). Using the integrated model, we first simulate relativistic heavy ion collisions at the RHIC and LHC energies starting from conventional smooth initial conditions. We next utilise each Monte Carlo samples of initial conditions on an event-by-event basis and perform event-by-event dynamical simulations to accumulate a large number of minimum bias events. A special attention is paid to performing the flow analysis as in experiments toward consistent comparison of theoretical results with experimental data. Anisotropic flow parameters, such as the second, third, fourth and fifth coefficients in the Fourier expansion of azimuthal particle distributions, turn out to depend on the flow analysis method, which suggests the importance of consistent comparison of the theoretical results with the experimental data. Some of these anisotropic parameters using the MC-KLN model initialisation differ from the ones using the Glauber model initialisation. Therefore one can discriminate between the initialisation models by analysing various anisotropic parameters simultaneously and comparing them with experimental data.

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