On the standard model predictions for $$R_K$$RK and $$R_{K^*}$$RK∗

  title={On the standard model predictions for \$\$R\_K\$\$RK and \$\$R\_\{K^*\}\$\$RK∗},
  author={Marzia Bordone and Gino Isidori and Andrea Pattori},
  journal={The European Physical Journal C},
We evaluate the impact of radiative corrections in the ratios $$\Gamma [B\rightarrow M \mu ^+\mu ^-]/\Gamma [B\rightarrow M \mathrm{e}^+\mathrm{e}^-]$$Γ[B→Mμ+μ-]/Γ[B→Me+e-] when the meson M is a K or a $$K^*$$K∗. Employing the cuts on $$m^2_{\ell \ell }$$mℓℓ2 and the reconstructed B-meson mass presently applied by the LHCb Collaboration, such corrections do not exceed a few $$\%$$%. Moreover, their effect is well described (and corrected for) by existing Monte Carlo codes. Our analysis… 

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