Measurement of the (B)over-bar->Dl(nu)over-bar partial width and form factor parameters
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Issue Date
1997-09Author
Ammar, Raymond G.
Baringer, Philip S.
Bean, Alice
Besson, David Zeke
Coppage, Don
Darling, C.
Davis, Robin E. P.
Hancock, N.
Kotov, S.
Kravchenko, I.
Kwak, Nowhan
Publisher
AMERICAN PHYSICAL SOC
Type
Article
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Show full item recordAbstract
We have studied the decay (B) over bar --> Dl<(nu)over bar>, where I = e or mu. From a fit to the differential decay rate d Gamma/dw we measure the rate normalization F-D (1)\V-cb\ and form factor slope <(rho)over cap>(2)(D), and, using measured values of tau(B), find Gamma(B --> Dl<(nu)over bar>) = (12.0 +/- 0.9 +/- 2.1) ns(-1). The resulting branching fractions are B((B) over bar(0) --> D(+)l(-)<(nu)over bar>) = (1.87 +/- 0.15 +/- 0.32)% and B(B- --> D(0)l(-)<(nu)over bar>) = (1.94 +/- 0.15 +/- 0.34)%. The form factor parameters are in agreement with those measured in B --> D*l<(nu)over bar> decays, as predicted by heavy quark effective theory.
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Citation
Athanas, M, Avery, P, et al. Measurement of the (B)over-bar->Dl(nu)over-bar partial width and form factor parameters. PHYSICAL REVIEW LETTERS. September 1997. 79(12) : 2208-2212
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