Hadron-quark mixed phase in the quark-meson coupling model
Hadron-quark mixed phase in the quark-meson coupling model
复制标题
夸克-介子耦合模型中的强子-夸克混合相
DOI：
10.1103/physrevc.103.025809
复制
发表时间：
2021-02
影响因子：
3.1
通讯作者：
Hong Shen
中科院分区：
文献类型：
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作者：
Min Ju;Xuhao Wu;Fan Ji;Jinniu Hu;Hong Shen
我们探讨了在中子星内部形成结构化强子-夸克混合相的可能性。强子相采用夸克-介子耦合（QMC）模型，该模型明确地包含了核子内部的夸克结构，而夸克相则采用与QMC框架中相同的袋模型来描述，以保持两个共存相的一致性.我们分析了强子-夸克pasta相的出现对中子星性质的影响。我们还讨论了核对称能和夸克物质中的袋常数B对退禁闭相变的影响。对于强子-夸克混合相的处理，我们采用能量最小化方法，并与Gibbs构造进行了比较。在能量最小化方法中考虑了有限尺寸效应，如表面能和库仑能，它们在强子-夸克相变过程中确定pasta构型时起着至关重要的作用。结果表明，相对于Gibbs结构，有限尺寸效应可以显著减小混合相的区域。利用QMC模型中一致的B值和夸克物质，我们发现在大质量恒星内部形成强子-夸克面食相，但不可能存在纯夸克物质。
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.