2005/01/31 by Yu. B. Ivanov, A. S. Khvorostukhin, E. É. Kolomeitsev +6 · 2 citations
Physics and Astronomy · #Astrophysics #Baryon #Cosmology and Gravitation Theories #Equation of state #Extrapolation #Hadron #High-Energy Particle Collisions Research #Lattice QCD #Neutron star #Nuclear physics #Particle physics #Physics #Pulsars and Gravitational Waves Research #Quantum chromodynamics #Quantum mechanics #Quark #Quark star #Stars #Strange matter #astro-ph #hep-lat #hep-ph #nucl-th
paper · pdf · doi:10.1103/physrevc.72.025804
published as Phys.Rev. C72 (2005) 025804 · 13 p., 8 figs., 7 tables, Version accepted by Phys. Rev. C
arxiv created 2005/06/01 · openalex publication_date 2005/08/26 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
A QCD-motivated dynamical-quasiparticle model with parameters adjusted to reproduce the lattice-QCD equation of state is extrapolated from the region of high temperatures and moderate baryonic densities to the domain of high baryonic densities and zero temperature. The resulting equation of state matched with realistic hadronic equations of state predicts a phase transition into the quark phase at higher densities than those reachable in neutron star interiors. This excludes the possibility of the existence of hybrid (hadron-quark) stars. Pure quark stars are possible and have low masses, small radii, and very high central densities. Similar results are obtained for a simple bag model with massive quarks, fitted to reproduce the same lattice results. Self-bound quark matter is also excluded within these models. Uncertainties in the present extrapolation are discussed. Comparison with standard bag models is made.