$ZZ\gamma$ production in the NLO QCD+EW accuracy at the LHC

Abstract

In this paper we present the first study of the impact of the $\mathcal{O}(\alpha )$ EW correction to the $pp\to ZZ\gamma +X$ process at the CERN Large Hadron Collider (LHC). The subsequent $Z$-boson leptonic decays are considered at the leading order using the MadSpin method, which takes into account the spin-correlation and off-shell effects from the $Z$-boson decays. We provide numerical results of the integrated cross section and the kinematic distributions for this process. In coping with final-state photon-jet separation in the QCD real emission and photon-induced processes, we adopt both the Frixione isolated-photon plus jets algorithm and the phenomenological quark-to-photon fragmentation function method for comparison. We find that the next-to-leading order (NLO) EW correction to the $ZZ\gamma$ production can be sizeable and amounts to about $-7\%$ of the integrated cross section, and provides a non$-$negligible contribution to the kinematic distributions, particularly in the high energy region. We conclude that the NLO EW correction should be included in precision theoretical predictions in order to match future experimental accuracy.

25 pages, 10 figures

References in corpus (6)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Automatic spin-entangled decays of heavy resonances in Monte Carlo simulations
• How bright is the proton? A precise determination of the photon parton distribution function
• Complete one-loop electroweak corrections to $ZZZ$ production at the ILC

Cited by in corpus (3)

• Les Houches 2021: Physics at TeV Colliders: Report on the Standard Model Precision Wishlist
• NLO electroweak and QCD corrections to the production of a photon with three charged lepton plus missing energy at the LHC
• Les Houches 2023 -- Physics at TeV Colliders: Report on the Standard Model Precision Wishlist