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28 March 2024
 
  » arxiv » nucl-th/0110040

 Article overview


Analysis of particle production in ultra-relativistic heavy ion collisions within a two-source statistical model
Zhong-Dao Lu ; Amand Faesler ; C. Fuchs ; E.E. Zabrodin ;
Date 17 Oct 2001
Journal Phys.Rev. C66 (2002) 044905
Subject nucl-th hep-ph nucl-ex
Affiliation1, 2), Amand Faesler , C. Fuchs , E.E. Zabrodin (3, 4) ( China Institute of Atomic Energy, Beijing, China; China Center of Advance Science and Technology, Beijing, China; Institut fuer Theoretische Physik, Universitaet Tuebingen, Germany; Institute
AbstractThe experimental data on hadron yields and ratios in central lead-lead and gold-gold collisions at 158 AGeV/$c$ (SPS) and $sqrt{s} = 130$ AGeV (RHIC), respectively, are analysed within a two-source statistical model of an ideal hadron gas. A comparison with the standard thermal model is given. The two sources, which can reach the chemical and thermal equilibrium separately and may have different temperatures, particle and strangeness densities, and other thermodynamic characteristics, represent the expanding system of colliding heavy ions, where the hot central fireball is embedded in a larger but cooler fireball. The volume of the central source increases with rising bombarding energy. Results of the two-source model fit to RHIC experimental data at midrapidity coincide with the results of the one-source thermal model fit, indicating the formation of an extended fireball, which is three times larger than the corresponding core at SPS.
Source arXiv, nucl-th/0110040
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