X(1870) and ${\eta }_2(1870)$: Which can be assigned as a hybrid state?

Chen Bing, Ke-Wei Wei, Ailin Zhang

The mass spectrum and strong decays of the X(1870) and ${\eta }_2(1870)$ are analyzed. Our results indicate that X(1870) and ${\eta }_2(1870)$ are the two different resonances. The narrower X(…