Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2007-03-23
Int.J.Mod.Phys.E16:1877-1882,2007
Physics
Nuclear Physics
Nuclear Theory
6 pages, 4 figures
Scientific paper
10.1142/S0218301307007167
We investigate the effect of chemical freeze-out on identified particle spectra at 200AGeV Au-Au Collisions at RHIC, by utilizing a full three-dimensional hydrodynamical calculation. The hydrodynamical code SPheRIO we employed is based on the smoothed particle hydrodynamic algorithm. In order to describe the spectra of strange hadrons, the code has been further improved by explicitly incorporating the strangeness conservation and a chemical freeze-out mechanism. In our model, strange hadrons such as Lambda, Xi, Omega and phi undergo the chemical freeze-out immediately after the hadronization, and their multiplicities are fixed thereafter. At a lower temperature the thermal freeze-out takes place for all the particles. It is shown that the present model provides a reasonably good description for the spectra of identified particles, in particular, considerable improvement is observed for those of strange hadrons.
Otavio Socolowski Jr.
Andrade Rone
Grassi Frederique
Hama Yogiro
Kodama Takeshi
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