Semileptonic  B and D decays from QCD sum rules

Alexander Khodjamirian (University of Siegen)

The recent applications of QCD light-cone sum rules (LCSRs) to 
semileptonic form factors of B and D mesons and the results of 
Vub determinations from exclusive semileptonic decays are  overviewed.
The LCSR methods with pion and kaon distribution amplitudes  are 
used as well as a more universal method with B-meson distribution
amplitudes where there is a more recent development and new applications
are expected. LCSRs combined with hadronic dispersion relations 
also supply quantitative estimates of nonresonant background 
in B semileptonic decays with two pions in the final state.