2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/46575We review QCD sum rule applications to hadronic matrix elements of exclusive $B$ and $D$ decays. Results are presented for the form factors $f^+$ and $F_0$ of $B \rightarrow π$ and $D\rightarrow π$ transitions. The predictions are used to compute the width of $D^* \rightarrow D π$, and to extract the CKM parameter $V_{ub}$ from the measured $B \rightarrow πe ν$ width. Furthermore, we comment on weak annihilation in $B \rightarrow ργ$, as well as on the radiative decays $D \rightarrow ργ$, $D \rightarrow K^* γ$, and $B \rightarrow μνγ$.6 pages, LaTex, 2 figures, epsf; talk presented by A. Khodjamirian at 28th International Conference on High Energy Physics, Warsaw, July 1996High Energy Physics - Phenomenologytext