Observation of $B^0 \to D_s^+ π^-$

Details Observation of $B^0 \to D_s^+ π^-$ Observation of $B^0 \to D_s^+ π^-$

2004-08-23

arxiv.org/abs/hep-ex/0408109v1

Physics

High Energy Physics

High Energy Physics - Experiment

9 pages, 3 figures, submitted to ICHEP2004, Beijing, China

Scientific paper

We report the first observation of $B^0 \to D_s^+ \pi^-$ and an improved measurement of ${\bar B^0} \to D_s^+K^-$ based on $274 \times 10^6$ $B{\bar B}$ events collected with the Belle detector at KEKB. We measure the branching fractions ${\cal B}({\bar B^0} \to D_s^+K^-) = (2.93 \pm 0.55 \pm 0.79) \times 10^{-5}$ and ${\cal B}(B^0 \to D_s^+ \pi^-) = (1.94 \pm 0.47 \pm 0.52) \times 10^{-5}$.

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