Determination of heavy-meson wave functions from B decays |
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Authors: | Hsiang-nan Li B Melić |
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Institution: | (1) Department of Physics, National Cheng-Kung University, Tainan, Taiwan 701, P.R. China , CN;(2) Theoretical Physics Division, Rudjer Boškovi\' c Institute, P.O. Box 1016, 10001 Zagreb, Croatia , HR |
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Abstract: | We extract the B, D, and meson wave functions from the CLEO data of the decays and in the perturbative QCD framework. In this formalism, various logarithmic corrections are organized to give the Wilson evolution
from the W boson mass down to the characteristic scale of a decay process, which is of order of the b quark mass, and the Sudakov evolution from the characteristic scale to a lower factorization scale of order . With large logarithms organized, the b quark decay amplitudes are evaluated reliably in perturbation theory. Below the factorization scale, QCD dynamics is regarded
as being nonperturbative, and absorbed into meson wave functions. Because of their universality, the heavy-meson wave functions
determined in this work, can be employed to make predictions of other decay modes. We also observe that the dependence of
heavy meson wave functions on intrinsic parton transverse momenta plays an important role in the explanation of data.
Received: 18 February 1999 / Revised version: 24 June 1999 / Published online: 3 November 1999 |
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