Phys. Rev. D 36, 1289–1301 (1987)Exclusive decays and masses of the B mesonsReceived 26 May 1987; published in the issue dated 1 September 1987 We report on the observation of exclusive decays of B mesons to modes containing a D or D*+ and one or two charged pions. From kinematic reconstruction we determine the masses of the neutral and charged B mesons to be 5280.6±0.8±2.0 and 5278.6±0.8±2.0 MeV, respectively. The mass difference is 2.0±1.1±0.3 MeV. Branching ratios for these modes are given. From the charged-particle momentum spectrum in Υ(4S) decay, we find the average branching fraction for B-meson decay into a D or D* plus a charged pion to be (0.81±0.16)%. We find no signal for exclusive decays which would arise from the b→u transition and set upper limits for several such modes. © 1987 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.36.1289
DOI:
10.1103/PhysRevD.36.1289
PACS:
14.40.Jz, 13.25.+m, 13.65.+i
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