A thermodynamically consistent quasi-particle model without density-dependent infinity of the vacuum zero point energy

Abstract

In this paper, we generalize the improved quasi-particle model proposed in J. Cao et al., [ Phys. Lett. B {\bf711}, 65 (2012)] from finite temperature and zero chemical potential to the case of finite chemical potential and zero temperature, and calculate the equation of state (EOS) for (2+1) flavor Quantum Chromodynamics (QCD) at zero temperature and high density. We first calculate the partition function at finite temperature and chemical potential, then go to the limit $T=0$ and obtain the equation of state (EOS) for cold and dense QCD, which is important for the study of neutron stars. Furthermore, we use this EOS to calculate the quark-number density, the energy density, the quark-number susceptibility and the speed of sound at zero temperature and finite chemical potential and compare our results with the corresponding ones in the existing literature.

References in corpus (38)

• Shapiro delay measurement of a two solar mass neutron star
• On the Phase Diagram of QCD
• Finite density QCD via imaginary chemical potential
• Thermodynamics of Two Flavor QCD to Sixth Order in Quark Chemical Potential
• A new method to study lattice QCD at finite temperature and chemical potential
• The Equation of State for Two Flavor QCD at Non-zero Chemical Potential
• EXO 0748-676 Rules out Soft Equations of State for Neutron Star Matter
• Small, Dense Quark Stars from Perturbative QCD
• Massive gluons and quarks and the equation of state obtained from SU(3) lattice QCD
• The Three-Loop Free Energy for Pure Gauge QCD
• The Three-Loop Free Energy for High-Temperature QED and QCD with Fermions
• The Free Energy of Hot Gauge Theories with Fermions Through g^5
• The Equation of State of Deconfined Matter at Finite Chemical Potential in a Quasiparticle Description
• Pressure and non-linear susceptibilities in QCD at finite chemical potentials
• Recent thermodynamic results from lattice QCD analyzed within a quasi-particle model
• On the Quasiparticle Description of Lattice QCD Thermodynamics
• The QCD equation of state near T_0 within a quasi-particle model
• Quark stars within relativistic models
• Self-consistent quasiparticle model for quark-gluon plasma
• QCD Critical Point in a Quasiparticle Model
• Comments on quasiparticle models of quark-gluon plasma
• A quasi-particle description of $(2+1)$- flavor lattice QCD equation of state
• Color-superconductivity in the strong-coupling regime of Landau gauge QCD
• The calculation of the equation of state of QCD at finite chemical potential and zero temperature
• Single parameter quasi-particle model for QGP
• Quasiparticle Description of Hot QCD at Finite Quark Chemical Potential
• Quasi-particle model of QGP - a revisit
• Quasiparticle Description of the QCD Plasma, Comparison with Lattice Results at Finite T and Mu
• New Class of Compact Stars at High Density
• Self-consistent quasiparticle model for 2, 3 and (2+1) flavor QGP
• Connecting neutron star observations to the high density equation of state of quasi-particle model
• Quark number susceptibility around the critical end point
• Quasiparticle Model of Quark-Gluon Plasma at Imaginary Chemical Potential
• Running coupling constant from lattice data and bulk viscosity of strange quark matter
• A thermodynamically consistent quasi-particle model without temperature-dependent infinity of the vacuum zero point energy
• Chiral dynamics in QCD at finite chemical potential
• Thermodynamics of Quasi-Particles
• The Equation of State and Quark Number Susceptibility in Hard-Dense-Loop Approximation

Cited by in corpus (6)

• Thermodynamic consistency, quark mass scaling, and properties of strange matter
• The chiral phase transition with a chiral chemical potential in the framework of Dyson-Schwinger equations
• Strange matter and strange stars in a thermodynamically self-consistent perturbation model with running coupling and running strange quark mass
• Strange quark matter and proto-strange stars in an equivaparticle model
• Baryon Number Fluctuations in Quasi-particle Model
• Nonextensive quasiparticle description of QCD matter