论文标题
SU（3）局部NAMBU-JONA-LASINIO（NJL）模型的SU Quark相变
Hadron-quark phase transition in the SU(3) local Nambu-Jona-Lasinio (NJL) model with vector interaction
论文作者
论文摘要
我们研究紧凑型明星物质的状态（EOS）的强体夸克杂交方程。具有矢量类型相互作用的Nambu-Jona-lasinio（NJL）局部SU（3）模型用于描述夸克物质阶段，而相对论均值场（RMF）理论具有标量 - 异源$Δ$Δ$ -Meson的有效领域，用于描述Hadronic阶段。结果表明，矢量耦合常数越大，奇怪夸克出现的阈值密度就越少。对于矢量耦合常数的足够小值，质量依赖对重型化学电位的功能具有歧义区域，该区域导致非震动夸克物质的相变，巴里昂数量密度突然变化。我们表明，在NJL模型的框架内，没有实现关于奇怪物质绝对稳定性的假设。为了描述从辐射物质到夸克物质的相过渡，应用了麦克斯韦的构造。结果表明，矢量耦合越大，夸克物质和相变压的EOS的刚度就越大。我们的结果表明，在中子星的中心形成的夸克相的无限核心是稳定的。
We study the hadron-quark hybrid equation of state (EOS) of compact-star matter. The Nambu-Jona-Lasinio (NJL) local SU(3) model with vector-type interaction is used to describe the quark matter phase, while the relativistic mean field (RMF) theory with scalar-isovector $δ$-meson effective field adopted to describe the hadronic matter phase. It is shown that the larger the vector coupling constant , the lower the threshold density for the appearance of strange quarks. For a sufficiently small value of the vector coupling constant, the functions of the mass dependence on the baryonic chemical potential have regions of ambiguity which leads to a phase transition in non-strange quark matter with an abrupt change in the baryon number density. We show that within the framework of the NJL model, the hypothesis on the absolute stability of strange quark matter is not realized. In order to describe the phase transition from hadronic matter to quark matter, the Maxwell's construction is applied. It is shown that the greater the vector coupling, the greater the stiffness of the EOS for quark matter and the phase transition pressure. Our results indicate that the infinitesimal core of the quark phase, formed in the center of the neutron star, is stable.
