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Measurement of the inclusive branching fractions for $${B}_{s}^{0}$$ decays into D mesons via hadronic tagging
Journal of High Energy Physics. 2025. Vol. 2025. No. 4. Article 114.
Adachi I., Aggarwal L., Ahmed H., Aihara H., Akopov N., Aloisio A., Al Said S., T. Aushev, D. Bodrov, P. Pakhlov, G. Pakhlova, T. Uglov, M. Yasaveev
We report measurements of the absolute branching fractions Br(Bs0 → Ds± X), Br(Bs0 → D0/D0-bar X), and Br(Bs0 → D± X), where the latter is measured for the first time. The results are based on a 121.4 fb−1 data sample collected at the Υ(10860) resonance by the Belle detector at the KEKB asymmetric-energy e+e − collider. We reconstruct one Bs0 meson in e+e− → Υ(10860) → Bs*Bs*-bar events and measure yields of Ds+, D0 and D+ mesons in the rest of the event. We obtain Br(Bs → Ds± X) = (68.6 ± 7.2 ± 4.0)%, Br(Bs0 → D0/D0-bar X) = (21.5 ± 6.1 ± 1.8)%, and Br(Bs0 → D± X) = (12.6 ± 4.6 ± 1.3)%, where the first uncertainty is statistical and the second is systematic. Averaging with previous Belle measurements gives Br(Bs0 → Ds± X) = (63.4 ± 4.5 ± 2.2)% and Br(Bs0 → D0/D0-bar X) = (23.9 ± 4.1 ± 1.8)%. For the Bs0 production fraction at the Υ(10860), we find fs = (21.4 +1.5 −1.7 )%.
Publication based on the results of:
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