Constructing new pseudoscalar meson nonets with the observed $X(2100)$, $X(2500)$, and $\eta (2225)$

Li-Ming Wang, Si-Qiang Luo, Zhi-Feng Sun +1

Stimulated by the BESIII observation of $X(2100)$, $X(2500)$, and $\eta (2225)$, we try to pin down new pseudoscalar meson nonets including these states. The analysis of mass spectra a…