Physical Review Letters 96,19 (2006) 191801;
We report an observation of the decay B-s(0)-> D-s(-)pi(+) in p (p) over bar collisions at root s = 1.96 TeV using 115 pb(-1) of data collected by the CDF II detector at the Fermilab Tevatron. We observe 83 +/- 11(stat) B-s(0)-> D-s(-)pi(+) candidates, representing a large increase in statistics over previous measurements and the first observation of this decay at a p (p) over bar collider. We present the first measurement of the relative branching fraction B(B-s(0)-> D-s(-)pi(+))/B(B-0 -> D-pi(+))=1.32 +/- 0.18(stat)+/- 0.38(syst). We also measure B(B+->(D) over bar (0)pi(+))/B(B-0 -> D-pi(+))=1.97 +/- 0.10(stat)+/- 0.21(syst), which is consistent with previous measurements.
collisions;; physics;; decays
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