Neutron stars with crossover to color superconducting quark matter

Abstract

We follow the idea that the QCD phase diagram may be described by a crossover from a hadron resonance gas to perturbative QCD using the switch function ansatz of Albright, Kapusta and Young [1]. While the switch function could be calibrated at vanishing baryon chemical potential with data from lattice QCD simulations, it has been suggested recently by Kapusta and Welle [2] that in the zero temperature limit, the switch function parameter ${\mu }_0$ could be constrained by neutron star phenomenology, in particular by massive pulsars like PSR J0740+6620 with a mass exceeding $2M_{\odot }$. In this work we demonstrate that this procedure to constrain the QCD phase diagram does crucially depend on the fact that cold dense quark matter is very likely in a color superconducting state.

9 pages, 6 figures

References in corpus (7)

• Refined Mass and Geometric Measurements of the High-Mass PSR J0740+6620
• New Critical Point Induced by the Axial Anomaly in Dense QCD
• Matching Excluded Volume Hadron Resonance Gas Models and Perturbative QCD to Lattice Calculations
• Was GW170817 a canonical neutron star merger? Bayesian analysis with a third family of compact stars
• Unified Interacting Quark Matter and its Astrophysical Implications
• Astrophysics with heavy-ion beams
• Hadron-quark continuity induced by the axial anomaly in dense QCD

Cited by in corpus (12)

• Quark-nuclear hybrid equation of state for neutron stars under modern observational constraints
• What neutron stars tell about the hadron-quark phase transition: a Bayesian study
• Sexaquark dilemma in neutron stars and its solution by quark deconfinement
• Recovering the conformal limit of color superconducting quark matter within a confining density functional approach
• Effect of color superconductivity on the mass of hybrid neutron stars in an effective model with pQCD asymptotics
• Hybrid star phenomenology from the properties of the special point
• Hybrid Strangeon Stars
• Constraining free parameters of a color superconducting non-local Nambu-Jona-Lasinio model using Bayesian analysis of neutron stars mass and radius measurements
• Implications of supermassive neutron stars for the form of the equation of state of hybrid stars
• Universal relations for anisotropic interacting quark stars
• Astrophysical constraints on the cold equation of state of the strongly interacting matter
• Bayesian Constraints on the Neutron Star Equation of State with a Smooth Hadron-Quark Crossover