Next-to-leading order QCD corrections to $W \gamma$ production in association with two jets

TL;DR

This paper presents next-to-leading order QCD calculations for W gamma production with two jets, incorporating full off-shell effects and spin correlations, crucial for background estimation in new physics searches.

Contribution

It provides the first NLO QCD corrections for W gamma + 2 jets with full off-shell and spin correlation effects, enhancing accuracy for experimental analyses.

Findings

NLO corrections significantly reduce scale uncertainties.

Non-trivial phase space dependence observed in corrections.

Results implemented in the VBFNLO Monte Carlo program.

Abstract

The QCD-induced $W^\pm \gamma$ production channels in association with two jets are computed at next-to-leading order QCD accuracy. The W bosons decay leptonicly and full off-shell and finite width effects as well as spin correlations are taken into account. These processes are important backgrounds to beyond Standard Model physics searches and also relevant to test the nature of the quartic gauge couplings of the Standard Model. The next-to-leading order corrections reduce the scale uncertainty significantly and show a non-trivial phase space dependence. Our code will be publicly available as part of the parton level Monte Carlo program VBFNLO.