Faculty of Physics - University of Bucharest

UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS

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2024-11-22 2:15

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Conference: Bucharest University Faculty of Physics 2010 Meeting

Section: Nuclear and Elementary Particles Physics

Title:

New simulation results using Buda-Lund hydrodynamic model

Authors:

Valerica Baban

Affiliation:

1. Atomic and Nuclear Physics Chair, Faculty of Physics, University of Bucharest,

2. Ovidius High School, Constantza,

E-mail

babanvalerica@yahoo.com

Keywords:

relativistic heavy ion collisions,hydrodynamical models, Buda-Lund model.

Abstract:

The Buda-Lund hydrodynamic model turned out to be quite successful describing BRAHMS, PHENIX, PHOBOS, STAR experimental data (Au-Au collisions at sqrt(sNN)=130 GeV and sqrt(sNN)=200 GeV, p-p collisions at sqrt(sNN)=200 GeV) and CERN SPS experimental data (Pb-Pb and h-p collisions). The measured particle spectra reflect properties of matter at the stage when particles cease to interact. This moment is called the kinetic (thermal) freeze-out. Hydro-inspired models like Buda-Lund model help us to verify the idea that matter, just before the kinetic freeze-out, is locally thermalized and exhibits collective behavior, such as the transverse and longitudinal expansion. The flow of the nuclear matter assumed in the Buda-Lund model has a Hubble-like structure, with the velocity of the fluid element proportional to its distance from the center. Such patterns appear in the analytic and numerical solutions of the equations of the relativistic hydrodynamics. In particular, Buda-Lund (BL) model has been developed to parameterize the single particle spectra and the two-particle Bose-Einstein correlations in high-energy heavy-ion Physics in terms of hydrodynamic expansion, for cylindrically symmetric sources. The Buda-Lund model gives, also, a very good description of the pT -spectra, v2 and HBT radii in the full rapidity range. In this work I intend to present Buda-Lund parameterization developed for freeze-out conditions in a few ultra-relativistic heavy ion collisions, interesting for BRAHMS Collaboration and CBM Collaboration in which the group is involved.