论文标题
破碎的SU（6）对称性和巨大的杂种星星
Broken SU(6) symmetry and massive hybrid stars
论文作者
论文摘要
在这项工作中，我们重新审视了量子HADRADYANIC（QHD）形式主义，以研究通过损坏的SU（6）组固定的超声含量耦合的超声和混合恒星，有利于更一般的风味组SU（3）。我们还采用了一个额外的频道，即陌生的$ ϕ $梅森，它仅将其伴随到超级子。在混合恒星中，Quark阶段是使用SU（3）NJL模型构建的，在Lagrangian中也有附加的向量通道。我们发现，一旦超子阈值始终以较低的密度发生，就无法通过夸克 - 哈德隆相的转变来避免使用超子拼图。同样，夸克芯在混合恒星中的贡献比质量比对质量更宽松，并且在很大程度上取决于状态的夸克方程。我们能够复制2.21 $ m_ \ odot $ hyperonic star和2.10 $ m_ \ odot $ hybrid star。这两种结果都与最近检测到的超大脉冲星MSP J0740+6620一致。
In this work we revisit the quantum hadrodynamics (QHD) formalism to investigate hyperonic and hybrid stars with hyperon-meson couplings fixed via broken SU(6) group, in favor of a more general flavor group SU(3). We also employ an additional channel, the strangeness-hidden $ϕ$ meson, which couples only to the hyperons. In hybrid stars, the quark phase is built with the SU(3) NJL model also with an additional vector channel in the Lagrangian. We found that within the models chosen the hyperon puzzle cannot be avoided by the quark-hadron phase transition, once the hyperon threshold always happens at lower density. Also, the contribution of the quark core in a hybrid star is more relavant to the radius than to the mass, and strongly depends on the quark equation of state. We are able to reproduce 2.21 $M_\odot$ hyperonic star and 2.10 $M_\odot$ hybrid star. Both results are in agreement with the recently detected hyper massive pulsar MSP J0740+6620.
