Impact of soft photons on B →kL+L

We give detailed results of O(α) QED corrections (both real emission and virtual corrections) to B→KL+L- modes. Requiring the real emission to be gauge invariant, the structure of the contact term(s) is fixed. The calculation is done with a fictitious photon mass as the IR regulator and results are shown to be independent of it, establishing the cancellation of the soft divergences. Results are presented for a choice of photon energy, kmax, and photon angle θcut. The QED effects are negative, thereby reducing the rate compared to that without QED effects. Electron channels are shown to receive large corrections (O(20%)). Impacts on lepton flavor universality ratio RKμe are also discussed.