Electroweak corrections to W-boson pair production at the LHC

Abstract

Vector-boson pair production ranks among the most important StandardModel benchmark processes at the LHC, not only in view of on-going Higgs analyses. These processes may also help to gain a deeper understanding of the electroweak interaction in general, and to test the validity of the Standard Model at highest energies. In this work, the first calculation of the full one-loop electroweak corrections to on-shell W-boson pair production at hadron colliders is presented. We discuss the impact of the corrections on the total cross section as well as on relevant differential distributions. We observe that corrections due to photon-induced channels can be amazingly large at energies accessible at the LHC, while radiation of additional massive vector bosons does not influence the results significantly. SFB/CPP

The gauge-Higgs legacy of the LHC Run I

“…We compare these results to the experimental predictions, defining a bin-by-bin correction factor. It accounts for phase-space dependent corrections either from detector effects or from higher order corrections [67][68][69][70][71][72]. These correction factors we apply to our simulated W V distributions in the presence of the anomalous TGVs, based on an in-house MadGraph5 implementation of the operators constructed with FeynRules [73].…”

“…[57]. To ensure this, we introduce a bin-by-bin correction factor to account for differences in the selection procedure because of detector effects as well as higher order corrections to the cross section prediction [67][68][69][70][71][72].…”

Next-to-leading-order electroweak corrections to pp → W+W− → 4 leptons at the LHC

“…Therefore, the approximations neither apply to low and intermediate energies, nor to the dominant kinematical domain of forward-produced W bosons at high energies. This shortcoming was overcome by complete NLO EW calculations for the production of on-shell W pairs [34][35][36], which already revealed…”

“…The discussion of EW corrections in the literature also includes effects of channels with photons in the initial state (so-called photon-induced channels), both for inelastic [34][35][36][37]39] and elastic [40] WW production. Owing to the huge γγ → WW cross section at large partonic CM energies, the impact of this channel is quite large, in particular in the forward and backward regions in the TeV range.…”

W + W − pair production in proton-proton collisions: small missing terms

“…Only the inelastic-inelastic contribution was discussed very recently in a broader context of electroweak corrections [27][28][29] (see also [30]). Since we concentrate on the missing mechanisms the latter will be calculated in the leading-order approximation only, dispite calculations in the next-to-leading order have been performed by different groups [31][32][33][34].…”