Radiative dileptonic decays of B mesons

We investigate the radiative dileptonic decays Bs(Bd) → γl+l− within the standard model. Using the constituent quark model, the branching ratios turn out to be around 5 × 10−9 for Bs → γμ+μ− and around 6 × 10−10 for Bd → γμ+μ−, with slightly larger values for Bs(Bd) → γe+e−. The differential rate as a function of the dilepton invariant mass is given. The possibility of using these processes to determine the decay constants of Bs or Bd is discussed.