摘要
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 5280.60.82.0 and 5278.60.82.0 MeV, respectively. The mass difference is 2.01.10.3 MeV. Branching ratios for these modes are given. From the charged-particle momentum spectrum in (4S) decay, we find the average branching fraction for B-meson decay into a D or D* plus a charged pion to be (0.810.16)%. We find no signal for exclusive decays which would arise from the bu transition and set upper limits for several such modes.
原文 | ???core.languages.en_GB??? |
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頁(從 - 到) | 1289-1301 |
頁數 | 13 |
期刊 | Physical Review D - Particles, Fields, Gravitation and Cosmology |
卷 | 36 |
發行號 | 5 |
DOIs | |
出版狀態 | 已出版 - 1987 |