Measurement of the B¯→Dlv¯ partial width and form factor parameters

CLEO Collaboration

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


We have studied the decayB¯→Dlν¯ where l = e or μ. From a fit to the differential decay ratedγ/dwwe measure the rate normalizationFD(1) |V cb | and form factor slopeρˆ2D, and, using measured values ofτB, findγ(B¯→Dlv¯) = (12.0 ± 0.9 ± 2.1) ns−1 . The resulting branching fractions areB (B¯0 → D+ lν¯) = (1.87 ± 0.15 ± 0.32)% and B (B → D0lν¯) = (1.94 ± 0.15 ± 0.34)% . The form factor parameters are in agreement with those measured in B¯ → D*lν¯ decays, as predicted by heavy quark effective theory.

Original languageEnglish (US)
Pages (from-to)2208-2212
Number of pages5
JournalPhysical Review Letters
Issue number12
StatePublished - 1997

ASJC Scopus subject areas

  • General Physics and Astronomy


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