Hyperon puzzle, hadron-quark crossover and massive neutron stars

K Masuda, T Hatsuda, T Takatsuka - The European Physical Journal A, 2016 - Springer
Bulk properties of cold and hot neutron stars are studied on the basis of the hadron-quark
crossover picture where a smooth transition from the hadronic phase to the quark phase …

Mapping neutron star data to the equation of state using the deep neural network

Y Fujimoto, K Fukushima, K Murase - Physical Review D, 2020 - APS
The densest state of matter in the Universe is uniquely realized inside the central cores of
the neutron star. While first-principles evaluation of the equation of state of such matter …

Density functional approach to quark matter with confinement and color superconductivity

O Ivanytskyi, D Blaschke - Physical Review D, 2022 - APS
We present a novel relativistic density-functional approach to modeling quark matter with a
mechanism to mimic confinement. The quasiparticle treatment of quarks provides their …

Constraining and applying a generic high-density equation of state

MG Alford, GF Burgio, S Han, G Taranto, D Zappalà - Physical Review D, 2015 - APS
We discuss the “constant speed of sound”(CSS) parametrization of the equation of state of
high-density matter and its application to the field correlator method (FCM) model of quark …

Finite-size effects at the hadron-quark transition and heavy hybrid stars

N Yasutake, R Łastowiecki, S Benić, D Blaschke… - Physical Review C, 2014 - APS
We study the role of finite-size effects at the hadron-quark phase transition in a new hybrid
equation of state constructed from an ab initio Brückner-Hartree-Fock equation of state with …

The quarkyonic star

K Fukushima, T Kojo - The Astrophysical Journal, 2016 - iopscience.iop.org
We discuss theoretical scenarios on crossover between nuclear matter (NM) and quark
matter (QM). We classify various possibilities into three major scenarios according to the …

Hybrid stars using the quark-meson coupling and proper-time Nambu–Jona-Lasinio models

DL Whittenbury, HH Matevosyan, AW Thomas - Physical Review C, 2016 - APS
Background: At high density deconfinement of hadronic matter may occur leading to quark
matter. The immense densities reached in the inner core of massive neutron stars may be …

Which first order phase transitions to quark matter are possible in neutron stars?

JE Christian, J Schaffner-Bielich, S Rosswog - Physical Review D, 2024 - APS
We examine which first order phase transitions are consistent with today's astrophysical
constraints. In particular, we explore how a well-constrained mass-radius data point would …

Phenomenological neutron star equations of state: 3-window modeling of QCD matter

T Kojo - The European Physical Journal A, 2016 - Springer
We discuss the 3-window modeling of cold, dense QCD matter equations of state at density
relevant to neutron star properties. At low baryon density, n_B\lesssim2n_s (n_s: nuclear …

[HTML][HTML] Proper time regularization and the QCD chiral phase transition

ZF Cui, JL Zhang, HS Zong - Scientific Reports, 2017 - nature.com
We study the QCD chiral phase transition at finite temperature and finite quark chemical
potential within the two flavor Nambu–Jona-Lasinio (NJL) model, where a generalization of …