PRL 102, 021801 (2009)

Belle: INSPIRE link

ParameterMeasurement
\({\cal{B}} ( \bar{B}_s^0 \to D_s^+ \pi^- )\)\([3.67 ^{+0.35}_{-0.33}\mbox{ (stat)} ^{+0.43}_{-0.42}\mbox{ (syst)} \pm 0.49\mbox{ (f_s)}] \times 10^{-3}\)
\({\cal{B}} ( \bar{B}_s^0 \to D_s^+ K^- )\)\([2.4 ^{+1.2}_{-1.0}\mbox{ (stat)} \pm 0.3\mbox{ (syst)} \pm 0.3\mbox{ (fs)}] \times 10^{-4}\)