Cross section line shape of $e^+e^-\toχ_{c0}ω$ around the $Y(4260)$ mass region

Abstract

We demonstrate that the recent measurement of the cross section line shapes of $e^+e^-\to χ_{c0}ω$ 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 $e^+e^-\to J/ψππ$, $h_cππ$, $\bar D D^*π+c.c.$, and $γX(3872)$.

6 pages, 2 Figures