Hadron-quark mixed phase in the quark-meson coupling model
| Autor: | Fan Ji, Hong Shen, Jinniu Hu, Min Ju, Xuhao Wu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Quark
Physics Particle physics Phase transition Nuclear Theory Meson 010308 nuclear & particles physics High Energy Physics::Lattice High Energy Physics::Phenomenology Hadron FOS: Physical sciences 01 natural sciences Deconfinement Nuclear Theory (nucl-th) Strange matter Phase (matter) 0103 physical sciences High Energy Physics::Experiment Nuclear Experiment 010306 general physics Nucleon |
| Zdroj: | Physical Review C. 103 |
| ISSN: | 2469-9993 2469-9985 |
| DOI: | 10.1103/physrevc.103.025809 |
| Popis: | We explore the possibility of a structured hadron-quark mixed phase forming in the interior of neutron stars. The quark-meson coupling (QMC) model, which explicitly incorporates the internal quark structure of the nucleon, is employed to describe the hadronic phase, while the quark phase is described by the same bag model as the one used in the QMC framework, so as to keep consistency between the two coexisting phases. We analyze the effect of the appearance of hadron-quark pasta phases on the neutron-star properties. We also discuss the influence of nuclear symmetry energy and the bag constant $B$ in quark matter on the deconfinement phase transition. For the treatment of the hadron-quark mixed phase, we use the energy minimization method and compare it with the Gibbs construction. The finite-size effects like surface and Coulomb energies are taken into account in the energy minimization method; they play crucial roles in determining the pasta configuration during the hadron-quark phase transition. It is found that the finite-size effects can significantly reduce the region of the mixed phase relative to that of the Gibbs construction. Using a consistent value of $B$ in the QMC model and quark matter, we find that hadron-quark pasta phases are formed in the interior of massive stars, but no pure quark matter can exist. |
| Databáze: | OpenAIRE |
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