Systematic of Particle Thermal Freeze-out in a Hadronic Fireball at RHIC

Abstract

We attempt to describe the rapidity and transverse momentum spectra of strange as well as non-strange hadrons e.g. cascade,cascadebar, lambda , lambdabar, proton, protonbar,(omega+omegabar, Kaon, anti-Kaon and their ratios in the ultra-relativistic collisions of gold nuclei at (Root sNN)=200 GeV. This is done by using a statistical thermal freeze-out model which incorporates the rapidity (collision) axis as well as transverse direction boosts developed within an expanding hot and dense hadronic fluid (fireball) till the final freeze-out. We determine the thermo-chemical freeze-out conditions particularly in terms of the temperature, baryon chemical potential and collective flow effect parameters for different particle species. The parameters indicate occurrence of freeze-out of the singly and doubly strange hyperon species at somewhat earlier times during the evolution of the fireball. The experimental data of the transverse momentum and rapidity distribution are well reproduced. The contribution of heavier hadronic resonance decay is taken into account.

23 Pages, 11 Figures

References in corpus (11)

• Hadron production in Au-Au collisions at RHIC
• Features of particle multiplicities and strangeness production in central heavy ion collisions between 1.7A and 158A GeV/c
• Antimatter production in proton-proton and heavy-ion collisions at ultrarelativistic energies
• Measurement of inclusive antiprotons from Au+Au collisions at 130 GeV
• The initial state of ultra-relativistic heavy ion collision
• Effective String Rope Model for the initial stages of Ultra-Relativistic Heavy Ion Collisions
• Exteneded Longitudinal Scaling and the Thermal Model
• A Unified Approach towards Describing Rapidity and Transverse Momentum Distributions in Thermal Freeze-Out Model
• UrQMD-2.3 - Changes and Comparisons
• Rapidity-dependent chemical potentials in a statistical approach
• Two introductory lectures on high energy QCD and heavy ion collisions

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• A Study of Transverse Momentum Distributions of Hadrons at LHC