Neutron stars: from the inner crust to the core with the (Extended) Nambu-Jona-Lasinio model

Abstract

Nucleonic matter is described within a su(2) extended Nambu-Jona-Lasinio model. Several parametrizations with different nuclear matter saturation properties are proposed. At subsaturation, nuclear pasta phases are calculated within two methods: the coexistence-phases approximation and the compressible liquid drop model, with the surface tension coefficient determined using a geometrical approach at zero temperature. An unified equation of state of stellar matter for the inner crust, with the nuclear pasta phases, and the core is calculated. The mass and radius of neutron stars within this framework are obtained for several families of hadronic and hybrid stars. The quark phase of hybrid stars is described within the su(3) NJL model including a vector term. Stellar macroscopic properties are in accordance with some of the recent results in the literature.

13 pages, 10 figures, published version

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• Nuclear Statistical Equilibrium Equation of State for Core Collapse
• Dense Matter in Neutron Stars with eXTP
• The effect of the energy functional on the pasta-phase properties of catalysed neutron stars
• Hadron-quark phase transition in the SU(3) local Nambu-Jona-Lasinio (NJL) model with vector interaction
• Regularization of the Nambu-Jona Lasinio model under a uniform magnetic field and the role of the anomalous magnetic moments
• Hyperon threshold and stellar radii
• Pasta phases within the QMC model
• Symmetry energy and neutron star properties in the saturated Nambu-Jona-Lasinio model
• Hyperons in the pasta phase
• A general framework to diagonalize vector--scalar and axial-vector--pseudoscalar transitions in the effective meson Lagrangian
• Nambu-Jona-Lasinio description of hadronic matter from a Bayesian approach
• Hadron-quark phase transition: the QCD phase diagram and stellar conversion
• Neutron star equation of state: identifying hadronic matter characteristics
• Symmetry potentials and in-medium nucleon-nucleon cross sections within the Nambu-Jona-Lasinio model in relativistic impulse approximation