Mixed QCD-EW two-loop corrections to Drell-Yan production

Abstract

The Drell-Yan production of charged lepton pairs is one of the key processes measured at hadron colliders. The QCD corrections to the cross section are known to order ${\alpha }_s^2$ and electroweak corrections are known to order $\alpha$. The next important step for a better theoretical understanding is the complete calculation of the mixed QCD-EW corrections of order ${\alpha }_s\alpha$. In my talk, I report on the first complete calculation of the virtual two-loop corrections of order $\alpha {\alpha }_s$ to the lepton-pair production cross section. The calculation is carried out analytically using tensor reduction, integration-by-parts relations and the method of differential equations. We validate a previous calculation of the subset of mixed QCD-QED corrections and show how the jet and soft functions of that reference can be used to subtract the infrared divergences of the complete mixed QCD-electroweak virtual corrections.

9 pages, 1 figure, talk given at RADCOR19