Hirano, Tetsufumi (Tokyo)
"Dynamical Modeling of Relativistic Heavy Ion Collisions"

We have constructed a dynamical and unified model based on a fully three-dimensional (3D) hydrodynamic description of the QGP. Hydrodynamics indeed directly connects with the EOS, where an assumption of local thermalization is made during hydrodynamic evolution. However, local thermalization can be expected only in the intermediate stage. Therefore, one needs to model dynamics of reactions appropriately before and after the hydrodynamic stage to draw some informations of the QGP from experimental data. In the early stage of reactions, we describe particle productions through the Color Glass Condensate picture of colliding energetic nuclei which can be initial conditions of the QGP fluid evolution. Whereas, in the late stage, local thermalization is no longer maintained due to expansion and dilution of the matter. We treat this gradual transition from locally thermalized system to free streaming particles via dilute interacting hadronic gases by utilizing a hadron cascade model. In this talk, I will firstly overview our dynamical model mentioned above. Secondly, I will show, based on the dynamical and unified model, recent analysis of heavy ion collisions at the RHIC energy.

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