Cross section line shape of e+e−→χc0ω around the Y(4260) mass region

Abstract

We demonstrate that the recent measurement of the cross section line shapes of e+e−→χc0ω can be naturally explained by the molecular picture for Y(4260) where the Y(4260) is treated as a hadronic molecule dominated by D¯D1(2420)+c.c. This result is consistent with properties extracted for Y(4260) as the D¯D1(2420)+c.c. molecular state in other reactions such as e+e−→J/ψππ, hcππ, D¯D⁎π+c.c., and γX(3872).