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- W4200633367 abstract "A search for double-heavy tetraquark state candidates $X_{ccbar{s}bar{s}}$ decaying to $D_{s}^{+}D_{s}^{+}$ and $D_{s}^{*+} D_{s}^{*+}$ is presented for the first time using the data samples of 102 million $Upsilon(1S)$ and 158 million $Upsilon(2S)$ events, and the data samples at $sqrt{s}$ = 10.52~GeV, 10.58~GeV, and 10.867~GeV corresponding to integrated luminosities of 89.5~fb$^{-1}$, 711.0~fb$^{-1}$, and 121.4~fb$^{-1}$, respectively, accumulated with the Belle detector at the KEKB asymmetric energy electron-positron collider. The invariant-mass spectra of the $D_{s}^{+}D_{s}^{+}$ and $D_{s}^{*+} D_{s}^{*+}$ are studied to search for possible resonances. No significant signals are observed, and the 90% confidence level upper limits on the product branching fractions [${cal B}(Upsilon(1S,2S) to X_{ccbar{s}bar{s}} + anything) times {cal B}(X_{ccbar{s}bar{s}} to D_{s}^{+}D_{s}^{+}(D_{s}^{*+} D_{s}^{*+}))$] in $Upsilon(1S,2S)$ inclusive decays and the product values of Born cross section and branching fraction [$sigma(e^+e^- to X_{ccbar{s}bar{s}} + anything ) times {cal B}(X_{ccbar{s}bar{s}} to D_{s}^{+}D_{s}^{+}(D_{s}^{*+} D_{s}^{*+}))$] in $e^+e^-$ collisions at $sqrt{s}$ = 10.52~GeV, 10.58~GeV, and 10.867~GeV under different assumptions of $X_{ccbar{s}bar{s}}$ masses and widths are obtained." @default.
- W4200633367 created "2021-12-31" @default.
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