Chirally improved quark Pauli blocking in nuclear matter and applications to quark deconfinement in neutron stars

Abstract

The relativistic mean field (RMF) model of the nuclear matter equation of state has been modified by including the effect of Pauli-blocking owing to quark exchange between the baryons. Different schemes of a chiral enhancement of the quark Pauli blocking have been suggested according to the adopted density dependence of the dynamical quark mass. The resulting equations of state for the pressure are compared to the RMF model DD2 with excluded volume correction. On the basis of this comparison a density-dependent nucleon volume is extracted which parametrises the quark Pauli blocking effect in the respective scheme of chiral enhancement. The dependence on the isospin asymmetry is investigated and the corresponding density dependent nuclear symmetry energy is obtained in fair accordance with phenomenological constraints. The deconfinement phase transition is obtained by a Maxwell construction with a quark matter phase described within a higher order NJL model. Solutions for rotating and nonrotating (hybrid) compact star sequences are obtained which show the effect of high-mass twin compact star solutions for the rotating case.

20 pages, 12 figures, 3 tables, text revised and extended, figures updated, references added, accepted for publication in Particles (2020)

References in corpus (8)

• Symmetry energy of dilute warm nuclear matter
• Appearance of Light Clusters in Post-bounce Evolution of Core-Collapse Supernovae
• Was GW170817 a canonical neutron star merger? Bayesian analysis with a third family of compact stars
• Chiral phase transition in an extended NJL model with higher-order multi-quark interactions
• Light $p$-shell nuclei with cluster structures ($4\le A\le 16$) in nuclear matter
• Neutron star mass limit at $2M_{\odot }$ supports the existence of a CEP
• The influence of Pauli blocking effects on the properties of dense hydrogen
• Second virial coefficients of light nuclear clusters and their chemical freeze-out in nuclear collisions

Cited by in corpus (12)

• Extreme Matter meets Extreme Gravity: Ultra-heavy neutron stars with crossovers and first-order phase transitions
• The slope, the hill, the drop, and the swoosh: Learning about the nuclear matter equation of state from the binary Love relations
• Finite-Temperature Quarkyonic Matter with an Excluded Volume Model
• Toward a unified equation of state for multi-messenger astronomy
• The special point on the hybrid star mass--radius diagram and its multi--messenger implications
• Constraining free parameters of a color superconducting non-local Nambu-Jona-Lasinio model using Bayesian analysis of neutron stars mass and radius measurements
• Second virial coefficients of light nuclear clusters and their chemical freeze-out in nuclear collisions
• Density-Induced Hadron-Quark Crossover via the Formation of Cooper Triples
• Induced surface and curvature tension equation of state for hadron resonance gas in finite volumes and its relation to morphological thermodynamics
• Resolution of hyper-triton chemical freeze-out puzzle in high energy nuclear collisions
• Bayesian analysis of multimessenger M-R data with interpolated hybrid EoS
• A new class of hybrid EoS with multiple critical endpoints for simulations of supernovae, neutron stars and their mergers