Light-front holography in $B$ physics

TL;DR

This paper employs AdS/QCD holographic Distribution Amplitudes to predict various B meson decay processes, providing a novel approach that avoids end-point singularities and compares favorably with experimental data.

Contribution

It introduces the use of AdS/QCD holographic DAs for vector mesons to improve decay predictions and handle end-point singularities in B physics.

Findings

AdS/QCD DAs avoid end-point singularities in radiative decay calculations.

Predictions for B decays align well with BaBar and LHCb data.

The approach enhances theoretical modeling of B meson decays.

Abstract

We use AdS/QCD holographic Distributions Amplitudes for the vector mesons $\rho$ and $K^*$ in order to predict the radiative decays $B \to \rho \gamma$ and $B \to K^* \gamma$ as well as the semileptonic decays $B \to \rho l \nu$ and $B \to K^* \mu^+ \mu^-$. 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 $B \to K^* \mu^+ \mu^-$, we compare our predictions to the latest BaBar and LHCb data respectively.