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Measurement of the e^+e^- to B_s⁰ bar{B}_s⁰ X cross section in the energy range from 10.63 to 11.02 GeV using inclusive D_s^(pm) and D⁰ production
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Measurement of the e^+e^- to B_s⁰ bar{B}_s⁰ X cross section in the energy range from 10.63 to 11.02 GeV using inclusive D_s^(pm) and D⁰ production
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We report the first measurement of the inclusive $e^+e^- \to b\bar{b} \to D_s^{\pm}X$ and $e^+e^- \to b\bar{b} \to D^0/\bar{D}^0X$ cross sections in the energy range from $10.63$ to $11.02$. Based on these results, we determine $\sigma(e^+ e^- \to B_s^0 \bar{B}_s^0 X)$ and $\sigma(e^+ e^- \to B\bar{B}X)$ in the same energy range. We measure the fraction of $B_s^0$ events at $\Upsilon(10860)$ to be $f_{\rm s}=(22.0^{+2.0}_{-2.1})\%$. We determine also the ratio of the $B_s^0$ inclusive branching fractions $\mathcal{B}(B_s^0 \to D^0/\bar{D}^0X)/\mathcal{B}(B_s^0 \to D_s^{\pm} X)=0.416 \pm 0.018 \pm 0.092$. The results are obtained using the data collected with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider.
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Cited by 1 Pith paper
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