DOI 10.1007/s100529900241
Skewed parton distributions for
transitions
Th. Feldmann - P. Kroll
Fachbereich Physik, Universität Wuppertal, 42097
Wuppertal, Germany
Received: 18 June 1999 / Revised version: 8 September 1999 / Published online: 3 November 1999
Abstract
We investigate the -
skewed parton distributions (SPDs) for
transitions
and determine the contributions from several sources
(overlaps of soft light-cone wave functions,
quark-antiquark annihilations and meson resonances).
The
transition form factors, which are
relevant in exclusive semi-leptonic and non-leptonic B-decays,
are obtained by integrating the
-
SPDs over the
momentum fraction x. A phenomenological determination of the relevant
parameters allows us to predict the form factors
and to obtain the branching ratios for semi-leptonic
decays.
Copyright Springer-Verlag 2000