Hadron production in Pb-Pb collisions at 158A GeV
Johann Rafelski, Jean Letessier (Department of Physics, U. Arizona,, Tucson, LPTHE-Univ. Paris 7-Jussieu)
TL;DR
This paper uses a statistical model to analyze hadron production in Pb-Pb collisions, suggesting the formation of a deconfined quark-gluon plasma fireball with specific thermodynamic properties.
Contribution
It provides a detailed characterization of the particle source in heavy ion collisions, indicating a lower temperature and specific baryochemical potential than previously expected.
Findings
Evidence for a deconfined quark-gluon plasma phase
Temperature of the fireball T_f approximately 140-150 MeV
Baryochemical potential 200-210 MeV
Abstract
A Fermi statistical model analysis of hadron abundances and spectra obtained in several relativistic heavy ion collision experiments is utilized to characterize a particle source. Properties consistent with a disintegrating, hadron evaporating, deconfined quark-gluon plasma phase fireball are obtained, with a baryochemical potential \mu_B=200-210MeV, and a temperature T_f\simeq 140-150MeV, significantly below previous expectations.
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Taxonomy
TopicsHigh-Energy Particle Collisions Research · Particle physics theoretical and experimental studies · Quantum Chromodynamics and Particle Interactions