First measurement of the B->pi l nu and B->rho(omega)l nu branching fractions
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Issue Date
1996-12Author
Ammar, Raymond G.
Baringer, Philip S.
Bean, Alice
Besson, David Zeke
Coppage, Don
Copty, N.
Davis, Robin E. P.
Hancock, N.
Kotov, S.
Kravchenko, I.
Kwak, Nowhan
Publisher
AMERICAN PHYSICAL SOC
Type
Article
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CLEO has studied B decays to pi l nu, rho l nu, and omega l nu, where l = e or mu, by incorporating the missing momentum into full B reconstruction. With the B-0 and B+ modes combined according to isospin predictions for the relative partial widths, we obtain B(B-0 --> pi(-)l(+)nu) = (1.8 +/- 0.4 +/- 0.3 +/- 0.2) x 10(-4) and B(B-0 --> rho(-)l(+)nu) = (2.5 +/- 0.4(0.7)(+0.5) +/- 0.5) x 10(-4), where the errors are statistical, systematic, and the estimated model dependence. We also estimate \V-ub\ = (3.3 +/- 0.2(-0.4)(+0.3) +/- 0.7) x 10(-3).
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Citation
Alexander, JP, Bebek, C, et al. First measurement of the B->pi l nu and B->rho(omega)l nu branching fractions. PHYSICAL REVIEW LETTERS. December 1996. 77(25) : 5000-5004
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