Mass prediction for the last discovered member of the axial-vector nonet with quantum numbers J${}^{PC}=1^{+-}$

Mihail Chizhov, Momchil Naydenov

In this paper we have shown that the novel mass relation among the vector states, $\varphi (1020)$ and $\varphi (1680)$, with quantum numbers J${}^{PC}=1^{--}$ and axial-vector strangeonium state…