2002/03/26 by I. N. Mishustin, L. M. Satarov, H. Stöcker +3 · 1 citation
Physics and Astronomy · #Baryon #Baryon number #Deconfinement #Hadron #High-Energy Particle Collisions Research #Nuclear matter #Nuclear physics #Nucleon #Particle physics #Phase transition #Physics #Pulsars and Gravitational Waves Research #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #Quark #Saturation (graph theory) #hep-ph
paper · pdf · doi:10.1103/physrevc.66.015202
published as Phys.Rev. C66 (2002) 015202 · 28 pages, 18 PostScript figures, submitted to Phys. Rev. C
arxiv created 2002/03/26 · openalex publication_date 2002/07/16 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We compare different models for hadronic and quark phases of cold baryon-rich matter in an attempt to find a deconfinement phase transition between them. For the hadronic phase we consider Walecka-type mean-field models, which describe well the nuclear saturation properties. We also use the variational chain model, which takes into account correlation effects. For the quark phase we consider the MIT bag model, the Nambu--Jona-Lasinio, and the massive quasiparticle models. By comparing pressure as a function of baryon chemical potential we find that crossings of hadronic and quark branches are possible only in some exceptional cases while for most realistic parameter sets these branches do not cross at all. Moreover, the chiral phase transition, often discussed within the framework of QCD motivated models, lies in the region where the quark phases are unstable with respect to the hadronic phase. We discuss possible physical consequences of these findings.