Speaker
Alexander Khodjamirian
Description
The search for new physics in the flavour-changing neutral-current
$b\to s \ell^+\ell^-$ transitions demands an accurate knowledge of the relevant hadronic parameters calculated in QCD.
For the exclusive semileptonic $B$ decays, in addition to the
form factors, also the relevant nonlocal hadronic matrix elements
have to be estimated.
I will discuss the hadronic effects in B\to K ^(*)\ell^+\ell^-$ decays at large recoil, obtained within a systematic approach,
combining light-cone operator-product expansion, QCD sum rules and
hadronic dispersion relations.
