Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-02-09
JETP Letters 73 (2001) 317
Physics
High Energy Physics
High Energy Physics - Phenomenology
10 pages, LaTeX, 5 figures. A misprint in the title is corrected
Scientific paper
10.1134/1.1378110
A generalization of the parton-like formula is used for the first time to find the differential distributions in the inclusive semileptonic weak decays of the B meson. The main features of this new approach are the treatment of the b-quark as an on-mass-shell particle and the inclusion of the effects arising from the b-quark transverse motion in the B-meson. Using the b-quark light-front (LF) distribution function related to the equal time momentum wave function taken from the ACM model we compute the electron energy spectra and the total semileptonic widths of the B meson. We find an impressive agreement between the electron energy spectra calculated in the LF approach and the ones obtained in the ACM model, provided the b quark mass is identified with the average of the floating b quark mass in the ACM model. In spite of the simplicity of the model we obtain a fair good description of the CLEO data for V_{cb}=0.042.
Grach I. L.
Kulikov Yu. P.
Narodetskii Ilya M.
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