Rare radiative leptonic B-decays

TL;DR

This paper predicts branching ratios for rare radiative leptonic B-decays using a relativistic quark model, including long-distance QCD effects and vector-meson resonances, providing detailed decay distributions.

Contribution

It introduces a comprehensive calculation of long-distance QCD effects and vector-meson resonances in radiative leptonic B-decays within a relativistic quark model, offering new predictions for branching ratios.

Findings

Predicted branching ratio for _s^0 ^+e^-=18.810^{-9}

Predicted branching ratio for _s^0  ^+^-=12.210^{-9}

Provided forward-backward asymmetry distribution

Abstract

We obtain predictions for $B_{(s)}\to e^+e^-\gamma$ and $B_{(s)}\to \mu^+\mu^-\gamma$ decays. All the contributions containing long-distance QCD effects are calculated in the framework of relativistic quark model. The contributions of the light vector-meson resonances related to the virtual photon emission from valence quarks of the $B$-meson are included. The highest branching ratios for the radiative leptonic B-decays are ${\cal B}(\bar B^0_s\to e^+e^-\gamma)=18.8\times10^{-9}$ and ${\cal B}(B^0_s\to \mu^+\mu^-\gamma)=12.2\times10^{-9}$. We also give the distribution of the foward-backward asymmetry.