Paper detail

X(1870) and $η_2(1870)$: Which can be assigned as a hybrid state?

The mass spectrum and strong decays of the X(1870) and $η_2(1870)$ are analyzed. Our results indicate that X(1870) and $η_2(1870)$ are the two different resonances. The narrower X(1870) seems likely a good hybrid candidate. We support the $η_2(1870)$ as the $η_2(2^1D_2)$ quarkonium. We suggest to search the isospin partner of X(1870) in the channels of $J/ψ\rightarrowρf_0(980)π$ and $J/ψ\rightarrowρb_1(1235)π$ in the future. The latter channel is very important for testing the hybrid scenario.