QCD Sum Rule Analysis of the Decays $B\to K{\ell }^{+}{\ell }^{-}$ and $B\to K^{\ast }{\ell }^{+}{\ell }^{-}$

P. Colangelo, F. De Fazio, P. Santorelli +1

We use QCD sum rules to calculate the hadronic matrix elements governing the rare decays $B\to K{\ell }^{+}{\ell }^{-}$ and $B\to K^{\ast }{\ell }^{+}{\ell }^{-}$ induced by the flavour changing neutr…