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Chiral symmetry restoration and the $\Delta$ matter formation in neutron stars

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arxiv 2203.00269 v1 pith:DNPUBE65 submitted 2022-03-01 nucl-th astro-ph.HE

Micha{l} Marczenko , Krzysztof Redlich , Chihiro Sasaki This is my paper · ORCID
classification nucl-thastro-ph.HE
keywords matterdeltachiralrestorationsymmetryfindhadronicneutron
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abstract

We analyze the effects of chiral symmetry restoration in hadronic matter, including the lowest-lying baryonic resonance $\Delta$ based on the parity doublet model. We study the role of $\Delta$ and its chiral partner on the equation of state (EoS) of dense matter under neutron star (NS) conditions of $\beta$-equilibrium and charge neutrality. We find that the softening of the EoS driven by the early onset of $\Delta$ matter due to partial restoration of chiral symmetry allows accommodating the modern multi-messenger astrophysical constraints on the mass, radius, and tidal deformability. The softening above the saturation density is accompanied by subsequent stiffening at high densities. We also find that the matter composition in the NS cores may be different upon variations of the repulsive interactions of $\Delta$ baryons in hadronic matter.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Suppression of dynamical momentum-space shell by chiral symmetry

    nucl-th 2025-09 conditional novelty 6.0 of 10

    In a parity doublet model, self-consistent minimization keeps the quark fraction at zero up to about 8n0, showing quark onset and chiral restoration need not coincide.

  2. Subsurface Vacancy Engineering Enables Atomically Clean and Oxidation-Resistant Copper Interfaces for Anode-Free Lithium Metal Batteries

    cond-mat.mtrl-sci 2025-08 reject novelty 5.0 of 10

    The abstract and the body of this preprint are entirely different papers, leaving the headline battery claim unsubstantiated.

  3. Constraints on the strength of first-order phase transition and its relation to nucleon mass

    nucl-th 2025-05 conditional novelty 4.0 of 10

    Using a parity doublet hadronic model, an NJL quark model, and integral causality constraints, the paper finds that the maximum allowed first-order phase-transition density jump in neutron-star matter decreases as the...

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