Ap. Szczepaniak et A. Radyushkin, Sudakov suppression in the soft heavy to light meson transition form factor - art. no. 034017, PHYS REV D, 5903(3), 1999, pp. 4017
We calculate the hard gluon contribution to the decay vertex that determine
s the heavy-to-light meson transition form factor at large recoil. It is fo
und that the resulting Sudakov suppression significantly decreases the soft
, wave function dependent contribution to the form factor. The phenomenolog
ical implications of these findings are discussed. [S0556-2821(99)04101-6].