A New Measurement of $B\to D^{*}\pi$ Branching Fractions

et al. (CLEO Collaboration); G. Brandenburg

A New Measurement of $B\to D^{*}\pi$ Branching Fractions

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arxiv hep-ex/9706019 v3 pith:LHDZXRCN submitted 1997-06-25 hep-ex

G. Brandenburg , et al. (CLEO Collaboration) This is my paper · ORCID

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keywords reconstructionupsilonaccumulatedbackgroundsbranchingcleo-iidecaysdescribe

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The decays Upsilon(4S) -> BB, followed by B -> D* pi and D* -> D pi, permit reconstruction of all kinematic quantities that describe the sequence without reconstruction of the D, with reasonably low backgrounds. Using an integrated e+e- luminosity of 3.1 fb^{-1} accumulated at the Upsilon(4S) by the CLEO-II detector, we report measurements of BR(B0 -> D*+ pi-) = (2.81 +/- 0.11 +/- 0.21 +/- 0.05) x 10^{-3} and BR(B- -> D*0 pi-) = (4.34 +/- 0.33 +/- 0.34 +/- 0.18) x 10^{-3}.

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