$WW\gamma$ production at hadron colliders with NLO QCD+EW corrections and parton shower effects

TL;DR

This paper provides a detailed analysis of $W^+W^-\gamma$ production at hadron colliders, incorporating NLO QCD+EW corrections and parton shower effects, highlighting the significance of photon-induced channels and theoretical uncertainties.

Contribution

It presents the first comprehensive NLO QCD+EW calculation for $W^+W^-\gamma$ production including parton shower effects at current and future colliders, emphasizing photon-induced contributions.

Findings

Photon-induced channels are significant at higher energies.

Jet veto reduces large QCD and EW corrections.

Theoretical uncertainties from PDFs and scale dependence are quantified.

Abstract

$W^+W^-\gamma$ production in proton-proton collision provides a window to the mechanism of electroweak symmetry breaking and a direct accessment to triple and quartic gauge couplings. Precision study of gauge boson self-interactions may also provide evidence of existence of new physics beyond the Standard Model. In this paper, we study the $W^+W^-\gamma$ production at the LHC and future higher energy proton-proton colliders at the QCD+EW NLO including parton shower effects. We find that the contributions from the photon-induced (i.e., $q\gamma$- and $\gamma\gamma$-initiated) channels are non-negligible since the photon luminosity can be enhanced significantly with the increment of colliding energy, and the large real jet emission QCD and EW corrections can be depressed sufficiently by applying the jet veto event selection scheme. Moreover, we also investigate the theoretical errors arising from the PDF uncertainty and the factorization/renormalization scale dependence.