• Open Access

Revisiting the equation of state of hybrid stars in the Dyson-Schwinger equation approach to QCD

Zhan Bai, Huan Chen, and Yu-xin Liu
Phys. Rev. D 97, 023018 – Published 25 January 2018

Abstract

We investigate the equation of state (EoS) and the effect of the hadron-quark phase transition of strong interaction matter in compact stars. The hadron matter is described with the relativistic mean field theory, and the quark matter is described with the Dyson-Schwinger equation approach of QCD. The complete EoS of the hybrid star matter is constructed with not only the Gibbs construction but also the 3-window interpolation. The mass-radius relation of hybrid stars is also investigated. We find that, although the EoS of both the hadron matter with hyperon and Δ-baryon and the quark matter are generally softer than that of the nucleon matter, the 3-window interpolation construction may provide an EoS stiff enough for a hybrid star with mass exceeding 2M and, in turn, solve the so-called “hyperon puzzle.”

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  • Received 30 July 2017

DOI:https://doi.org/10.1103/PhysRevD.97.023018

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

Zhan Bai1,2,*, Huan Chen3, and Yu-xin Liu1,2,4,†

  • 1Department of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
  • 2Collaborative Innovation Center of Quantum Matter, Beijing 100871, China
  • 3School of Mathematics and Physics, China University of Geosciences, Wuhan 430074, China
  • 4Center for High Energy Physics, Peking University, Beijing 100871, China

  • *baizhan@pku.edu.cn
  • Corresponding author. yxliu@pku.edu.cn

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Issue

Vol. 97, Iss. 2 — 15 January 2018

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