Effect of chemical freeze out on identified particle spectra at 200AGeV Au-Au Collisions at RHIC using SPheRIO

Abstract

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.

arXiv comment6 pages, 4 figures

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• Study of the sensitivity of observables to hot spot size in heavy ion collisions
• Decomposition of fluctuating initial conditions and flow harmonics
• $p_T$-Dependent Particle Number Fluctuations From Principal Component Analyses in Hydrodynamic Simulations of Heavy-Ion Collisions
• On the origin of trigger-angle dependence of di-hadron correlations
• Two-particle correlations at high-energy nuclear collisions, peripheral-tube model revisited
• On the peripheral-tube description of the two-particle correlations in nuclear collisions
• A quasiparticle equation of state with a phenomenological critical point
• A Systematic Study on Direct Photon Production from Central Heavy Ion Collisions
• On statistical fluctuations in collective flows
• NeXSPheRIO results on azimuthal anisotropy in Au-Au collisions at 200A GeV