Constraint to chiral invariant masses of nucleons from GW170817 in an extended parity doublet model
Constraint to chiral invariant masses of nucleons from GW170817 in an extended parity doublet model
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DOI：
10.1103/physrevc.100.025205
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发表时间：
2019-01
影响因子：
3.1
通讯作者：
T. Yamazaki;M. Harada
中科院分区：
文献类型：
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作者：
T. Yamazaki;M. Harada
我们基于扩展的宇称重态模型构建了包含四个轻核子$N(939)$、$N(1440)$、$N(1535)$和$N(1650)$的核物质。我们通过要求正常核物质的饱和性质来排除手性不变质量的某些值；饱和密度，结合能，不可压缩性和对称能。通过对中子星合并GW170817引力波的观测，我们发现了对手性不变质量的进一步约束。我们的结果表明，手性不变质量大于约600 $,$MeV。我们还对高密度区的对称能和斜率参数进行了一些预测，这些将在未来的实验中进行测量。
We construct nuclear matter based on an extended parity doublet model including four light nucleons $N(939)$, $N(1440)$, $N(1535)$, and $N(1650)$. We exclude some values of the chiral invariant masses by requiring the saturation properties of normal nuclear matter; saturation density, binding energy, incompressibility, and symmetry energy. We find further constraint to the chiral invariant masses from the tidal deformability determined by the observation of the gravitational waves from neutron star merger GW170817. Our result shows that the chiral invariant masses are larger than about $600\,$MeV. We also give some predictions on the symmetry energy and the slope parameters in the high density region, which will be measured in future experiments.