Parity-doubled nucleons can rapidly cool neutron stars

Abstract

In confined hadronic matter, the spontaneous breaking and restoration of chiral symmetry can be described by considering nucleons, $N_{+}(939)$, and excited states of opposite parity, $N_{-}(1535)$. In a cold, dense hadronic phase where chiral symmetry remains spontaneously broken, direct Urca decay processes involving the $N_{-}$ are possible, e.g. $N_{-}\to N_{+}+e^{-}+{\bar{\nu }}_e$. We show that at low temperature and moderate densities, because the $N_{-}$ is much heavier than the $N_{+}$, such cooling dominates over standard $N_{+}$ direct Urca processes. This provides a strong astrophysical signature of the pattern of chiral symmetry restoration in neutron stars.

v2: 8 pages, 3 figures. Published in Phys. Rev. Lett

References in corpus (63)

• PSR J0030+0451 Mass and Radius from NICER Data and Implications for the Properties of Neutron Star Matter
• A NICER View of PSR J0030+0451: Millisecond Pulsar Parameter Estimation
• A NICER View of the Massive Pulsar PSR J0740+6620 Informed by Radio Timing and XMM-Newton Spectroscopy
• Refined Mass and Geometric Measurements of the High-Mass PSR J0740+6620
• Phases of Dense Quarks at Large N_c
• Core-collapse supernova equations of state based on neutron star observations
• Neutrino Emission from Neutron Stars
• Relativistic effective interaction for nuclei, giant resonances, and neutron stars
• A NICER View of the Nearest and Brightest Millisecond Pulsar: PSR J0437$\unicode{x2013}$4715
• On the importance of viscous dissipation and heat conduction in binary neutron-star mergers
• An updated mass-radius analysis of the 2017-2018 NICER data set of PSR J0030+0451
• Neutrino Emission from Cooper Pairs and Minimal Cooling of Neutron Stars
• Meson vacuum phenomenology in a three-flavor linear sigma model with (axial-)vector mesons
• Superfluidity in nuclear systems and neutron stars
• The Radius of the High-mass Pulsar PSR J0740+6620 with 3.6 yr of NICER Data
• Chiral Symmetry of Baryons
• Quantifying uncertainties and correlations in the nuclear-matter equation of state
• Vacuum Properties of Mesons in a Linear Sigma Model with Vector Mesons and Global Chiral Invariance
• Equation of state and thickness of the inner crust of neutron stars
• The hadronic SU(3) Parity Doublet Model for Dense Matter, its extension to quarks and the strange equation of state
• The Radius of PSR J0740+6620 from NICER with NICER Background Estimates
• Vacuum phenomenology of the chiral partner of the nucleon in a linear sigma model with vector mesons
• Light baryons below and above the deconfinement transition: medium effects and parity doubling
• Cold, dense nuclear matter in a SU(2) parity doublet model
• Constraints on Thermal X-ray Radiation from SAX J1808.4-3658 and Implications for Neutron Star Neutrino Emission
• Dense matter in compact stars - A pedagogical introduction
• Equation of state for hot QCD and compact stars from a mean field approach
• Chiral Symmetry Realization for Even- and Odd-parity Baryon Resonances
• Asymmetric nuclear matter in a parity doublet model with hidden local symmetry
• Nuclear matter within a dilatation-invariant parity doublet model: the role of the tetraquark at nonzero density
• Chiral Symmetry for Positive and Negative Parity Nucleons
• Hybrid Stars in an SU(3) Parity Doublet Model
• Nuclear Matter and Neutron stars in a Parity Doublet Model
• Rapid neutrino cooling in the neutron star MXB 1659-29
• Chiral symmetry restoration by parity doubling and the structure of neutron stars
• Neutron star cooling: Theoretical aspects and observational constraints
• Emergence of microphysical bulk viscosity in binary neutron star post-merger dynamics
• Quark-hadron crossover equations of state for neutron stars: constraining the chiral invariant mass in a parity doublet model
• Relativistic mean-field theories for neutron-star physics based on chiral effective field theory
• The application of the Quark-Hadron Chiral Parity-Doublet Model to neutron star matter
• The neutron star soft X-ray transient 1H1905+000 in quiescence
• Remarks on nuclear matter: how an ${\omega }_0$ condensate can spike the speed of sound, and a model of $Z(3)$ baryons
• Constraining Superfluidity in Dense Matter from the Cooling of Isolated Neutron Stars
• Neutron stars within the SU(2) parity doublet model
• Toward a unified equation of state for multi-messenger astronomy
• Chiral spin symmetry and the QCD phase diagram
• Parity Doubling and the Dense Matter Phase Diagram under Constraints from Multi-Messenger Astronomy
• Chiral symmetry restoration and the $\Delta$ matter formation in neutron stars
• Reconciling multi-messenger constraints with chiral symmetry restoration
• The chiral phase transition and the axial anomaly
• Chiral condensates for neutron stars in hadron-quark crossover: from a parity doublet nucleon model to an NJL quark model
• Impacts of anomaly on nuclear and neutron star equation of state based on a parity doublet model
• Neutron star matter based on a parity doublet model including the $a_0(980)$ meson
• Astrophysics and Nuclear Physics Informed Interactions in Dense Matter: Inclusion of PSR J0437-4715
• Anomalous $U(1{)}_A$ couplings and the Columbia plot
• Fluctuations and correlations of baryonic chiral partners
• Short-Range Correlations and Urca Process in Neutron Stars
• SU(3) parity doubling in cold neutron star matter
• Tabulated Equations of State From Models Informed by Chiral Effective Field Theory
• Baryon parity doublets and chiralspin symmetry
• Ordinary and exotic mesons in the extended Linear Sigma Model
• Simultaneous description of high density QCD matter in heavy ion collisions and neutron star observations
• Emergent chirality and superfluidity of parity-doubled baryons in neutron stars