Title

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

Document Type

Article

Publication Date

1-1-1997

Abstract

We have studied the decayB →Dlν where l = e or μ. From a fit to the differential decay ratedγ/dwwe measure the rate normalizationF (1) |V cb | and form factor slopeρ , and, using measured values ofτ , findγ(B →Dlv ) = (12.0 ± 0.9 ± 2.1) ns . The resulting branching fractions areB (B → D l ) = (1.87 ± 0.15 ± 0.32)% and B (B → D l ν ) = (1.94 ± 0.15 ± 0.34)% . The form factor parameters are in agreement with those measured in B → D*l ν decays, as predicted by heavy quark effective theory. © 1997 The American Physical Society. ¯ ¯ ˆ2 ¯ ¯ −1 ¯0 + − ν¯ − 0 − ¯ ¯ − ¯ D D B

Publication Name

Physical Review Letters

Volume Number

79

First Page

2208

Last Page

2212

Issue Number

12

DOI

10.1103/PhysRevLett.79.2208

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