2005/10/26 by P. Castorina, M. Mannarelli, Massimo Mannarelli
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #High-Energy Particle Collisions Research #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1016/j.physletb.2006.11.058
published as Phys.Lett.B644:336-339,2007 · 4 pages, 1 figure
arxiv created 2005/10/26 · openalex publication_date 2006/12/09 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
The effective degrees of freedom of the quark–gluon plasma are studied in the temperature range ∼(1–2)Tc. We show that including light bosonic states one can reproduce the pressure and energy density of the quark–gluon plasma obtained by lattice simulations. The number of the bosonic states required is at most of the order of 20, consistent with the number of light mesonic states and in disagreement with a recently proposed picture of the quark–gluon plasma as a system populated with exotic bound states. We also constrain the quark quasiparticle chiral invariant mass to be ≲300MeV. Some remarks regarding the role of the gluon condensation and the baryon number-strangeness correlation are also presented.