Journal
EUROPEAN PHYSICAL JOURNAL C
Volume 81, Issue 8, Pages -Publisher
SPRINGER
DOI: 10.1140/epjc/s10052-021-09470-5
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Funding
- Science and Technology Research Council (STFC) [ST/T00102X/1]
- STFC Ernest Rutherford Fellowship [ST/S005048/1]
- ERC [REINVENT-714788]
- Regione Lombardia [2017-2070]
- Italian MUR through the FARE grant [R18ZRBEAFC]
- European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme [788223]
- UK Science and Technology Facilities Council [ST/P001246/1]
- Fondazione Cariplo [2017-2070]
- STFC [ST/P001246/1] Funding Source: UKRI
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This article presents a calculation of NLO QCD corrections to gluon-induced electroweak gauge boson pair production, gg -> ZZ and gg -> W+W-, matched to PYTHIA 8 parton shower in the POWHEG approach. The calculation incorporates continuum background, Higgs-mediated processes, and their interference, allowing for realistic experimental effects in precision analyses of diboson production and the Higgs boson in the offshell regime.
We present a calculation of the next-to-leading order (NLO) QCD corrections to gluon-induced electroweak gauge boson pair production, gg -> ZZ and gg -> W+W-, matched to the PYTHIA 8 parton shower in the POWHEG approach. The calculation consistently incorporates the continuum background, the Higgs-mediated gg -> H -> VV process, and their interference. We consider leptonic decay modes of the vector bosons and retain offshell and non-resonant contributions. The processes considered are loop-induced at leading order and thus contain two-loop virtual contributions as well as loop-squared real contributions. Parton-shower effects are found to be marginal in inclusive observables and quite sizeable in observables that are exclusive in additional jet radiation. The Monte Carlo generator presented here allows for realistic experimental effects to be incorporated in state-of-the-art precision analyses of diboson production and of the Higgs boson in the offshell regime.
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