Constraint to chiral invariant masses of nucleons from GW170817 in an extended parity doublet model

Takahiro Yamazaki, Masayasu Harada

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 chi…