Evidence for a vector charmonium-like state in $e^{+}{e}^{-}\to D_s^{+}{D}_{s2}^{\ast }(2573{)}^{-}+c\mathrm{.}c\mathrm{.}$

We report the measurement of $e^{+}{e}^{-}\to D_s^{+}{D}_{s2}^{\ast }(2573{)}^{-}+c\mathrm{.}c\mathrm{.}$ via initial-state radiation using a data sample of an integrated luminosity of 921.9 fb${}^{-1}$ collected with the Belle detector at the $\mathrm{{\rm Y}}(4S)$ and nearby. We find evidence for an enhancement with a 3.4$\sigma$ significance in the invariant mass of $D_s^{+}{D}_{s2}^{\ast }(2573{)}^{-}+c\mathrm{.}c\mathrm{.}$ The measured mass and width are $(4619.8_{-8.0}^{+8.9}(\mathrm{s}\mathrm{t}\mathrm{a}\mathrm{t}\mathrm{.})\pm 2.3(\mathrm{s}\mathrm{y}\mathrm{s}\mathrm{t}\mathrm{.}))\mathrm{M}\mathrm{e}\mathrm{V}\mathrm{/}{c}^2$ and $(47.0_{-14.8}^{+31.3}(\mathrm{s}\mathrm{t}\mathrm{a}\mathrm{t}\mathrm{.})\pm 4.6(\mathrm{s}\mathrm{y}\mathrm{s}\mathrm{t}\mathrm{.}))\mathrm{M}\mathrm{e}\mathrm{V}$, respectively. The mass, width, and quantum numbers of this enhancement are consistent with the charmonium-like state at 4626 MeV/$c^2$ recently reported by Belle in $e^{+}{e}^{-}\to D_s^{+}{D}_{s1}(2536{)}^{-}+c\mathrm{.}c\mathrm{.}$ The product of the $e^+e^-\to D^+sD^*{s2}(2573)^-+c.c.$crosssectionandthebranchingfractionof$D^_{s2}(2573)^-\to{\bar D}^0K^-$ismeasuredfrom$D^+_sD^_{s2}(2573)^-$ threshold to 5.6 GeV.