Recent developments in $q_T$ subtraction: EW corrections and power suppressed contributions

TL;DR

This paper extends the $q_T$ subtraction method to include electroweak corrections and analyzes power suppressed effects at small transverse momentum in Drell-Yan processes, aiming to improve precision in collider predictions.

Contribution

It applies $q_T$ subtraction to NLO electroweak corrections and provides new analytical insights into power suppressed contributions at small $q_T$ in Drell-Yan production.

Findings

Numerical results for NLO EW corrections to Drell-Yan process.

Analytical results on soft radiation effects for charged massive final states.

Investigation of power suppressed contributions at small $q_T$.

Abstract

The $q_T$ subtraction formalism represents a well established and successful technique to deal with the computation of QCD radiative corrections up to NNLO (and beyond) for a large class of processes relevant at the LHC. We have explored the possibility to apply $q_T$ subtraction to the computation of EW corrections with the (final) aim to develop a subtraction formalism suitable for the computation of mixed QCD-EW corrections. We present numerical results for the complete NLO EW corrections to the Drell-Yan production of a massive lepton pair. Furthermore, we have investigated the structure of the power suppressed contributions at small-$q_T$ in this process and we present new analytical results on the effects of the soft radiation emitted off a charged massive final state.