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 Whereas, in the late stage, local thermalization is no
longer maintained due to expansion and dilution of the matter.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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