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Measurement of the (B)over-bar->Dl(nu)over-bar partial width and form factor parameters
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.
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.
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Abstract
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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1997-09
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AMERICAN PHYSICAL SOC
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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