On the pole trajectory of the subthreshold negative parity nucleon with varying pion masses

Qu-Zhi Li, Zhiguang Xiao, Han-Qing Zheng

We study the pole trajectory of the recently established subthreshold negative parity nucleon pole, namely the $N^{\ast }(920)$, with varying pion masses, in the scheme of linear $\ddot{I}ƒ$ mo…