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The bound state corrections to the semileptonic decays of the B meson. The light-front approach versus ACM model

I. L. Grach·P. Yu. Kulikov·I. M. Narodetskii
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Abstract

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.

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I. L. Grach, P. Yu. Kulikov, I. M. Narodetskii. 2001-05-21. The bound state corrections to the semileptonic decays of the B meson. The light-front approach versus ACM model. https://doi.org/10.1134/1.1378110

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