  Based on the dual representation in terms of the recently established
eigenfunctions of the evolution kernel in heavy-quark effective theory, we
investigate the description of the B-meson light-cone distribution amplitude
(LCDA) beyond tree-level. In particular, in dual space, small and large momenta
do not mix under renormalization, and therefore perturbative constraints from a
short-distance expansion in the parton picture can be implemented independently
from non-perturbative modelling of long-distance effects. It also allows to
(locally) resum perturbative logarithms from large dual momenta at fixed values
of the renormalization scale. We construct a generic procedure to combine
perturbative and non-perturbative information on the B-meson LCDA and compare
different model functions and the resulting logarithmic moments which are the
relevant hadronic parameters in QCD factorization theorems for exclusive
B-meson decays.
