1998/09/28 by P. Rehberg, Peter Rehberg, L. Bot +2 · 15 citations
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Hadronization #High-Energy Particle Collisions Research #Meson #Nuclear physics #Particle physics #Physics #Plasma #Quantum Chromodynamics and Particle Interactions #Quark #Quark–gluon plasma #hep-ph
paper · pdf · doi:10.1016/s0375-9474(99)00232-8
published in Nuclear Physics A 653(4), 415-435 (Elsevier BV)
arxiv created 1998/09/28 · openalex publication_date 1999/07/01 · arxiv updated 2011/07/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Using a chirally symmetric Lagrangian, which contains quarks as elementary degrees of freedom and mesons as bound states, we investigate the expansion and hadronization of a fireball, which initially contains only quarks and produces mesons by collisions. For this model, we study the time scales of expansion and thermal and chemical equilibration. We find that the expansion progresses relatively fast, leaving not necessarily enough time to establish thermal and chemical equilibrium. Mesons are produced in the bulk of the fireball rather than at a surface, at a temperature below the Mott temperature. Initial density fluctuations become amplified during the expansion. These observations challenge the applicability of hydrodynamical approaches to the expansion of a quark-gluon plasma.