Longitudinal fluid dynamics for ultrarelativistic heavy-ion collisions

Journal Article · Thu Feb 15 04:00:00 EST 2007 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.75.024903· OSTI ID:20991029

Satarov, L M; Mishustin, I N ^[1]; Merdeev, A V ^[2]; Stoecker, H ^[1]

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1. Frankfurt Institute for Advanced Studies, J.W. Goethe University, Max-von-Laue-Str. 1, D-60438 Frankfurt am Main (Germany)
2. The Kurchatov Institute, Russian Research Center, RU-123182 Moscow (Russian Federation)

We developed a 1+1 dimensional hydrodynamical model for central heavy-ion collisions at ultrarelativistic energies. Deviations from Bjorken's scaling are taken into account by implementing finite-size profiles for the initial energy density. The calculated rapidity distributions of pions, kaons, and antiprotons in central Au+Au collisions at {radical}(s{sub NN})=200 GeV are compared with experimental data of the BRAHMS Collaboration. The sensitivity of the results to the choice of the equation of state, the parameters of the initial state, and the freeze-out conditions were investigated. Experimental constraints on the total energy of produced particles were used to reduce the number of model parameters. The best fits of experimental data were obtained for soft equations of state and Gaussian-like initial profiles of the energy density. It was found that initial energy densities required for fitting the experimental data decrease with the increasing critical temperature of the phase transition.

• OSTI ID: 20991029
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 2 Vol. 75; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANTIPROTONS
CRITICAL TEMPERATURE
ENERGY DENSITY
EQUATIONS OF STATE
EXPERIMENTAL DATA
FLUID MECHANICS
FREEZING OUT
GEV RANGE 100-1000
HEAVY ION REACTIONS
KAONS
ONE-DIMENSIONAL CALCULATIONS
PHASE TRANSFORMATIONS
PIONS
RELATIVISTIC RANGE