Continuity from neutron matter to color-superconducting quark matter with ${}^3{P}_2$ superfluidity

Abstract

I clarify how the concept of quark-hadron continuity, which was previously considered in the context of the asymptotic color-flavor locked phase with ideal three-flavor symmetry, is applied to two-flavor matter. Our observation is that neutron star matter can continuously be connected to two-flavor color-superconducting (2SC) phase with an additional condensate of $d$-quarks in the ${}^3{P}_2$ channel. I discuss here two aspects of this novel phase. First, I introduce the notion of continuity based on the patterns of symmetry breaking and the corresponding order parameters, and then explain qualitatively the physics mechanism of $d$-quark ${}^3{P}_2$ pairing in analogy to nuclear physics. Our finding serves as the theoretical underpinning for the phenomenological construction of the equation of state in the neutron star environment.

arXiv comment4 pages, contribution to the proceedings of XXVIIIth International Conference on Ultrarelativistic Nucleus-Nucleus Collisions (Quark Matter 2019)

References in corpus (7)

• From hadrons to quarks in neutron stars: a review
• The Condensed Matter Physics of QCD
• Continuity of Quark and Hadron Matter
• New Critical Point Induced by the Axial Anomaly in Dense QCD
• Mapping neutron star data to the equation of state using the deep neural network
• Methodology study of machine learning for the neutron star equation of state
• Continuity from neutron matter to two-flavor quark matter with ${}^1{S}_0$ and ${}^3{P}_2$ superfluidity

Cited by in corpus (3)

• Topological confinement of vortices in two-flavor dense QCD
• Chiral non-Abelian vortices and their confinement in three flavor dense QCD
• Alice meets Boojums in neutron stars: vortices penetrating two-flavor quark-hadron continuity