Line shape of the radiative open-charm decay of Y(4140) and Y(3930)

In this work, we study the radiative open-charm decays Y(4140) -> D-s*D-+(s)-gamma and Y(3930) -> D-s*D-+(s)-gamma under the assignments of D-s*(D) over bar (s)* and D*(D) over bar* as molecular states for Y(4140) and Y(3930), respectively. Based on our numerical result, we propose the experimental measurement of the photon spectrum of Y(4140) -> D-s*(+) D-s(-)gamma, D-s(+) D-s*(-)gamma Y(3930) -> D*(0) (D) over bar (0)gamma, D-0 (D) over bar*(0)gamma, D-s*D-+(s)-gamma, Ds+Ds*(-)gamma can further test the molecular assignment for Y(4140) and Y(3930).