Vector-Interaction-Enhanced Bag Model

Abstract

A commonly applied quark matter model in astrophysics is the thermodynamic bag model (tdBAG). The original MIT bag model approximates the effect of quark confinement, but does not explicitly account for the breaking of chiral symmetry, an important property of Quantum Chromodynamics (QCD). It further ignores vector repulsion. The vector-interaction-enhanced bag model (vBag) improves the tdBAG approach by accounting for both dynamical chiral symmetry breaking and repulsive vector interactions. The latter is of particular importance to studies of dense matter in beta-equilibriumto explain the two solar mass maximum mass constraint for neutron stars. The model is motivated by analyses of QCD based Dyson-Schwinger equations (DSE), assuming a simple quark-quark contact interaction. Here, we focus on the study of hybrid neutron star properties resulting from the application of vBag and will discuss possible extensions.

arXiv comment9 pages, 4 figures, conference proceedings of CSQCD 6

References in corpus (26)

• Shapiro delay measurement of a two solar mass neutron star
• A Massive Pulsar in a Compact Relativistic Binary
• The order of the quantum chromodynamics transition predicted by the standard model of particle physics
• NJL-model analysis of dense quark matter
• Equations of state for supernovae and compact stars
• The chiral and deconfinement aspects of the QCD transition
• Full result for the QCD equation of state with 2+1 flavors
• Critical point of QCD at finite T and μ, lattice results for physical quark masses
• The NANOGrav Nine-year Data Set: Mass and Geometric Measurements of Binary Millisecond Pulsars
• Dyson-Schwinger Equations: Density, Temperature and Continuum Strong QCD
• Fluctuations of conserved charges at finite temperature from lattice QCD
• Goldstone Theorem and Diquark Confinement Beyond Rainbow-Ladder Approximation
• Freeze-out Conditions in Heavy Ion Collisions from QCD Thermodynamics
• Dynamical Chiral Symmetry Breaking, Goldstone's Theorem and the Consistency of the Schwinger--Dyson and Bethe--Salpeter Equations
• Phase structure of three and four flavor QCD
• Phase diagram and critical endpoint for strongly-interacting quarks
• Extended NJL Model for light and heavy mesons without q-qbar thresholds
• A Novel Approach to Model Hybrid Stars
• Pion form factor from a contact interaction
• Vector interaction enhanced bag model for astrophysical applications
• An effective chiral Hadron-Quark Equation of State
• Three Lectures on Hadron Physics
• The state of matter in simulations of core-collapse supernovae -- Reflections and recent developments
• Simultaneous chiral symmetry restoration and deconfinement - Consequences for the QCD phase diagram
• Cold quarks in medium: an equation of state
• Consequences of simultaneous chiral symmetry breaking and deconfinement for the isospin symmetric phase diagram

Cited by in corpus (15)

• Equation of state constraints from the threshold binary mass for prompt collapse of neutron star mergers
• Systematics of prompt black-hole formation in neutron star mergers
• Rotating neutron stars with quark cores
• Universal relations for rapidly rotating cold and hot hybrid star
• Quark Models and Radial Oscillations: Decoding the HESS J1731-347 Compact Object's Equation of State
• Interacting $ud$ and $uds$ quark matter at finite densities and quark stars
• The special point on the hybrid star mass--radius diagram and its multi--messenger implications
• Hadron-Quark phase transition in the context of GW190814
• A Bayesian analysis of the properties of hybrid stars with the NJL model
• Magnetic-Field Induced Deformation in Hybrid Stars
• A Bayesian study of quark models in view of recent astrophysical constraints
• Modern nuclear and astrophysical constraints of dense matter in a renormalized chiral approach
• Impact of the Nuclear Equation of State on the Stability of Hybrid Neutron Stars
• The sharpness of the quark-hadron transition and the properties of hybrid stars
• Tidal Deformability of Quark Stars with Repulsive Interactions