Cross section line shape of $e^{+}{e}^{-}\to {\chi }_{c0}\omega$ around the $Y(4260)$ mass region

Abstract

We demonstrate that the recent measurement of the cross section line shapes of $e^{+}{e}^{-}\to {\chi }_{c0}\omega$ can be naturally explained by the molecular picture for $Y(4260)$ where the $Y(4260)$ is treated as a hadronic molecule dominated by $\bar{D}{D}_1(2420)+c.c.$ This result is consistent with properties extracted for $Y(4260)$ as the $\bar{D}{D}_1(2420)+c.c.$ molecular state in other reactions such as $e^{+}{e}^{-}\to J/\psi \pi \pi$, $h_c\pi \pi$, $\bar{D}{D}^{\ast }\pi +c.c.$, and $\gamma X(3872)$.

Comments: 6 pages, 2 Figures