Measurement of the inclusive branching fractions for Bₛ⁰ decays into D mesons via hadronic tagging

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We report measurements of the absolute branching fractions B(Bₛ⁰→ Dₛ±X) , B(Bₛ⁰→ D⁰/D̄ ⁰X) , and B(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*B̄ ₛ* events and measure yields of Dₛ⁺ , D 0, and D + mesons in the rest of the event. We obtain B(Bₛ⁰→ Dₛ±X)=(68.6± 7.2± 4.0)% , B(Bₛ⁰→ D⁰/D̄ ⁰X)=(21.5± 6.1± 1.8)% , and B(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 B(Bₛ⁰→ Dₛ±X)=(63.4± 4.5± 2.2)% and B(Bₛ⁰→ D⁰/D̄ ⁰X)=(23.9± 4.1± 1.8)% . For the Bₛ⁰ production fraction at the Υ(10860), we find fₛ=(21.4-1.7+1.5)% .