Inverse bremsstrahlung contributions to Drell-Yan like processes

The contribution of the sub-process $\gamma q\to q^{\mathrm{\prime }}{l}_1{\bar{l}}_2$ in hadron-hadron interactions is considered. It is a part of one-loop electroweak radiative corrections for the Drell-Yan production of lepton pairs at hadron colliders. It is shown that this contribution should be taken into account aiming at the 1% accuracy of the Drell-Yan process theoretical description. Both the neutral and charged current cases are evaluated. Numerical results are presented for typical conditions of LHC experiments.