Constraining the Hadron-Quark Phase Transition Chemical Potential via Astronomical Observation

Abstract

We investigate the chemical potential and baryon number density of the hadron-quark phase transition in neutron star matter. The hadron matter is described with relativistic mean field theory, and the quark matter is described with the Dyson-Schwinger equation approach of QCD. In order to study the first-order phase transition, we develop the sound speed interpolation scheme to construct the equation of state in the middle density region where the hadron phase and quark phase coexist. The phase transition chemical potential is constrained with the maximum mass, the tidal deformability and the radius of neutrons stars. And the most probable value of the phase transition chemical potential is found.

arXiv comment20 pages, 11 figures, 2 tables. Extension of arXiv:1903.12336. Contribution to the Proceedings of the CUSTIPEN Workshop on the EOS of Dense Neutron-Rich Matter in the Era of Gravitational-Wave Astronomy. One Figure, some discussions and References added

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