Kavli Affiliate: T. Higuchi
| First 5 Authors: Belle, Belle II Collaborations, :, I. Adachi, L. Aggarwal
| Summary:
We report measurements of the absolute branching fractions $mathcal{B}(B_s^0
to D_s^{pm} X)$, $mathcal{B}(B_s^0 to D^0/bar{D}^0 X)$, and
$mathcal{B}(B_s^0 to D^{pm} X)$, where the latter is measured for the first
time. The results are based on a 121.4,fb$^{-1}$ data sample collected at the
$Upsilon(10860)$ resonance by the Belle detector at the KEKB asymmetric-energy
$e^+ e^-$ collider. We reconstruct one $B_s^0$ meson in $e^+e^- to
Upsilon(10860) to B_s^{*} bar{B}_s^{*}$ events and measure yields of
$D_s^+$, $D^0$, and $D^+$ mesons in the rest of the event. We obtain
$mathcal{B}(B_s^0 to D_s^{pm} X) = (68.6 pm 7.2 pm 4.0)%$,
$mathcal{B}(B_s^0 to D^0/bar{D}^0 X) = (21.5 pm 6.1 pm 1.8)%$, and
$mathcal{B}(B_s^0 to D^{pm} X) = (12.6 pm 4.6 pm 1.3)%$, where the first
uncertainty is statistical and the second is systematic. Averaging with
previous Belle measurements gives $mathcal{B}(B_s^0 to D_s^{pm} X) = (63.4
pm 4.5 pm 2.2)%$ and $mathcal{B}(B_s^0 to D^0/bar{D}^0 X) = (23.9 pm 4.1
pm 1.8)%$. For the $B_s^0$ production fraction at the $Upsilon(10860)$, we
find $f_s = (21.4^{+1.5}_{-1.7})%$.
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