$WH$ production at the LHC within SMEFT at next-to-next-to-leading order QCD

TL;DR

This paper calculates NNLO QCD corrections to W and WH production at the LHC within SMEFT, analyzing how dimension-six operators influence these processes compared to the Standard Model.

Contribution

It provides the first NNLO QCD calculations for W and WH production in SMEFT, enhancing precision in probing new physics effects.

Findings

NNLO corrections significantly affect production rates.

SMEFT operators modify the cross sections compared to the Standard Model.

Results improve the theoretical accuracy for Higgs-associated production analyses.

Abstract

We study the impact of $q \bar q' W$ and $q \bar q' WH$ interactions, originating from dimension-six operators of the Standard Model Effective Field Theory (SMEFT), on the Higgs boson associated production $pp \to W^+H$ at the LHC. We compute the next-to-next-to-leading order QCD corrections to this process and compare these corrections in the Standard Model and SMEFT production mechanisms.