The Semileptonic Decay Fraction of B Mesons in the Light of Interfering Amplitudes

Details The Semileptonic Decay Fraction of B Mesons in the Light of Interfering Amplitudes The Semileptonic Decay Fraction of B Mesons in the Light of Interfering Amplitudes

1993-12-06

arxiv.org/abs/hep-ph/9312229v1

Z.Phys. C63 (1994) 117-120

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages

Scientific paper

10.1007/BF01577550

Consequences of the interference between spectator amplitudes for the lifetimes and semileptonic decay fractions of B^0 and B^+ mesons are discussed. Assuming duality and constructive interference between spectator amplitudes we are able to explain the low experimental value for the semileptonic decay fraction of $B$ mesons. Extracting these amplitudes from a fit to 11 exclusive hadronic B decay fractions we find a_1 = 1.05 +/- 0.03 +/- 0.10, a_2 =+0.227 +/ 0.012 +/- 0.022, an inclusive semileptonic decay fraction of (11.2 +/- 0.5 +/- 1.7), and a lifetime ratio tau(B^+) / tau(B^0) = 0.83 +/- 0.01 +/- 0.01.

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