TY - JOUR

T1 - Delineating the properties of neutron star matter in cold, dense QCD

AU - Kojo, Toru

N1 - Funding Information:
The author thanks the organizers of the conference for this very enjoyable meeting. He also thanks G. Baym, K. Fukushima, S. Furusawa, T. Hatsuda, D. Hou, J. Okafor, P. Powell, Y. Song, D. Suenaga, T. Takatsuka, H. Togashi, for collaboration. This work is supported by the NSFC grant 11650110435 and 11875144.
Publisher Copyright:
© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0).

PY - 2019

Y1 - 2019

N2 - The properties of dense QCD matter are delineated through the construction of equations of state which should be consistent with the low and high density limits of QCD, nuclear laboratory experiments, and the neutron star observations. These constraints, together with the causality condition of the sound velocity, are used to develop the picture of hadron-quark continuity in which hadronic matter continuously transforms into quark matter (modulo small 1st order phase transitions). The resultant unified equation of state at zero temperature and β-equilibrium, which we call Quark-Hadron-Crossover (QHC19), is consistent with the measured properties of neutron stars as well as the microphysics known for the hadron phenomenology. In particular to ∼ 10n0 (n0: saturation density) the gluons remain as non-perturbative as in vacuum and the strangeness can be as abundant as up- and down-quarks at the core of two-solar mass neutron stars. Within our modeling the maximum mass is found less than ' 2.35 times solar mass and the baryon density at the core ranges in ∼ 5-8n0.

AB - The properties of dense QCD matter are delineated through the construction of equations of state which should be consistent with the low and high density limits of QCD, nuclear laboratory experiments, and the neutron star observations. These constraints, together with the causality condition of the sound velocity, are used to develop the picture of hadron-quark continuity in which hadronic matter continuously transforms into quark matter (modulo small 1st order phase transitions). The resultant unified equation of state at zero temperature and β-equilibrium, which we call Quark-Hadron-Crossover (QHC19), is consistent with the measured properties of neutron stars as well as the microphysics known for the hadron phenomenology. In particular to ∼ 10n0 (n0: saturation density) the gluons remain as non-perturbative as in vacuum and the strangeness can be as abundant as up- and down-quarks at the core of two-solar mass neutron stars. Within our modeling the maximum mass is found less than ' 2.35 times solar mass and the baryon density at the core ranges in ∼ 5-8n0.

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M3 - Conference article

AN - SCOPUS:85099558468

SN - 1824-8039

VL - 363

JO - Proceedings of Science

JF - Proceedings of Science

M1 - 244

T2 - 37th International Symposium on Lattice Field Theory, LATTICE 2019

Y2 - 16 June 2019 through 22 June 2019

ER -