Hi all, is anybody familiar with (QED for simplicity) radiative corrections for absolute cross section measurements in lepton (electron) DIS, or SIDIS, or exclusive reactions ? I'd be glad if someone can brainstorm even on elastic cross section. I think I understand they are fairly different, but I'm unsure about the interpretations of the respective contributions of real and virtual corrections. UV divergencies cancel each other, but how about infrared ones ? Is it correct to say that we publish a "classical" cross section with Planck constant's going to zero, which is strictly zero at the quantum level ? Thanks in advance for sharing your thoughts.