Measurement of the {bar B} {yields} D{ell}{bar {nu}} Anti-Neutrino Partial Width and Form Factor Parameters
We have studied the decay {bar B} {yields} D{ell}{bar {nu}}, where {ell} = e or {mu}. From a fit to the differential decay rate d{Lambda}/dw we measure the rate normalization F{sub D}(1)|V{sub cb}| and form factor slope {rho}{sub D}{sup 2}, and, using measured values of {tau}{sub B}, find {Lambda}({bar B} {yields} D{ell}{bar {nu}}) = (12.0 {+-} 0.9 {+-} 2.1) ns{sup -1}. The resulting branching fractions are {Beta}({bar B}{sup 0} {yields} D{sup +}{ell}{sup -}{bar {nu}}) = (1.87 {+-} 0.15 {+-} 0.32)% and {Beta}(B{sup -} {yields} D{sup 0}{ell}{sup -}{bar {nu}}) = (1.94 {+-} 0.15 {+-} 0.34)%. The form factor parameters are in agreement with those measured in {bar B} {yields} D*{ell}{bar {nu}} decays, as predicted by heavy quark effective theory.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (US)
- DOE Contract Number:
- AC03-76SF00515
- OSTI ID:
- 813077
- Report Number(s):
- SLAC-PUB-9776; TRN: US0303640
- Resource Relation:
- Other Information: PBD: 5 May 2003
- Country of Publication:
- United States
- Language:
- English
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