Measurement of the B → Dℓν branching fractions and form factor

CDF Collaboration

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55 Scopus citations


Using a sample of 3.3 × 106 B-meson decays collected with the CLEO detector at the Cornell Electron Storage Ring, we have studied B- → D0-ν and B0 → D+-ν decays, where ℓ- can be either e- or μ-. We distinguish B → Dℓν from other B semileptonic decays by examining the net momentum and energy of the particles recoiling against D - ℓ pairs. We find Γ(B → Dℓν) = (14.1±1.0±1.2)ns-1 and derive branching fractions for B- → D0-ν and B0 → D+-ν of (2.32±0.17±0.20)% and (2.20±0.16±0.19)%, respectively, where the uncertainties are statistical and systematic. We also investigate the B → Dℓν form factor and the implication of the result for |Vcb|.

Original languageEnglish (US)
Pages (from-to)3746-3750
Number of pages5
JournalPhysical review letters
Issue number19
StatePublished - 1999
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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