DOI 10.1007/s100529900204
Determination of heavy-meson wave functions from Bdecays
1 Department of Physics, National Cheng-Kung University,
Tainan, Taiwan 701, P.R. China
2 Theoretical Physics Division, Rudjer Boskovic Institute,
P.O. Box 1016, 10001 Zagreb, Croatia
Received: 18 February 1999 / Revised version: 24 June 1999 / Published online: 3 November 1999
Abstract
We extract the B, D, and D* 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 bquark 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.
Copyright Springer-Verlag
