Form Factors and Long-Distance Effects in $B\to V(P){\ell }^{+}{\ell }^{-}$ and $B\to V\gamma$

Abstract

I overview the hadronic input for the exclusive flavour-changing neutral-current $B$-decays with a vector ($V=K^{\ast },\rho$) or pseudoscalar ($P=K,\pi$) meson in the final state. After presenting the current status of $B\to P,V$ form factors, I discuss the estimate of the charm-loop effect in $B\to K^{(\ast )}{\ell }^{+}{\ell }^{-}$ and $B\to K^{\ast }\gamma$.

Comments: 7 pages, 4 figures, Proceedings of CKM2010, the 6th International Workshop on the CKM Unitarity Triangle, University of Warwick, UK, 6-10 September 2010