On the quantum numbers of the $X(1880)$

Qin-He Yang, Ling-Yun Dai, Ulf-G. Meißner

We study the properties of the $X(1880)$, the structure around the $\bar{p}p$ threshold that appears in the $3({\pi }^{+}{\pi }^{-})$ invariant mass spectrum in the decay process of $J/ψ\to γ3(π…