We report the measurement of $e^{+}{e}^{-}\to D_s^{+}{D}_{s2}^{*}(2573{)}^{-}+\mathrm{c}.\mathrm{c}.$ via initial-state radiation using a data sample of an integrated luminosity of $921.9{\mathrm{fb}}^{-1}$ collected with the Belle detector at the $\mathrm{\Upsilon }(4S)$ and nearby. We find evidence for an enhancement with a $3.4\sigma$ significance in the invariant mass of $D_s^{+}{D}_{s2}^{*}(2573{)}^{-}+\mathrm{c}.\mathrm{c}.$ The measured mass and width are $({4619.8}_{-8.0}^{+8.9}(\mathrm{stat}.)\pm 2.3(\mathrm{syst}.))\mathrm{MeV}/c^2$ and $({47.0}_{-14.8}^{+31.3}(\mathrm{stat}.)\pm 4.6(\mathrm{syst}.))\mathrm{MeV}$, respectively. The mass, width, and quantum numbers of this enhancement are consistent with the charmoniumlike state at $4626\mathrm{MeV}/c^2$ recently reported by Belle in $e^{+}{e}^{-}\to D_s^{+}{D}_{s1}(2536{)}^{-}+\mathrm{c}.\mathrm{c}.$ The product of the $e^{+}{e}^{-}\to D_s^{+}{D}_{s2}^{*}(2573{)}^{-}+\mathrm{c}.\mathrm{c}.$ cross section and the branching fraction of $D_{s2}^{*}(2573{)}^{-}\to {\overline{D}}^0{K}^{-}$ is measured from $D_s^{+}{D}_{s2}^{*}(2573{)}^{-}$ threshold to 5.6 GeV.

• Received 6 April 2020
• Accepted 23 April 2020

DOI:https://doi.org/10.1103/PhysRevD.101.091101

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Published by the American Physical Society