Light-front holography in $B$ physics

Abstract

We use AdS/QCD holographic Distributions Amplitudes for the vector mesons $\rho$ and $K^{\ast }$ in order to predict the radiative decays $B\to \rho \gamma$ and $B\to K^{\ast }\gamma$ as well as the semileptonic decays $B\to \rho l\nu$ and $B\to K^{\ast }{\mu }^{+}{\mu }^{-}$. For the radiative decays, we find that the AdS/QCD DAs offer the advantage of avoiding end-point singularities when computing power suppressed contributions. For the semileptonic decays $B\to \rho l\nu$ and $B\to K^{\ast }{\mu }^{+}{\mu }^{-}$, we compare our predictions to the latest BaBar and LHCb data respectively.

Comments: 6 pages, 4 figures. Proceedings contribution to the Light-Cone 2014 workshop held at North-Carolina Sate University, Raleigh, USA (May 26 - 30)