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QCD Corrections in SMEFT Fits to $WZ$ and $WW$ Production

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arxiv 1909.11576 v3 pith:6PRWHFBP submitted 2019-09-23 hep-ph hep-ex

Julien Baglio , Sally Dawson , Samuel Homiller This is my paper
classification hep-phhep-ex
keywords correctionsproductionresultssmeftanalysiscouplingseffectiveeffects
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We investigate the role of anomalous gauge boson and fermion couplings on the production of $WZ$ and $W^+W^-$ pairs at the LHC to NLO QCD in the Standard Model effective field theory, including dimension-6 operators. Our results are implemented in a publicly available version of the POWHEG-BOX. We combine our $WZ$ results in the leptonic final state $e\nu \mu^+\mu^-$ with previous $W^+W^-$ results to demonstrate the numerical effects of NLO QCD corrections on the limits on effective couplings derived from ATLAS and CMS 8 and 13 TeV differential measurements. Our study demonstrates the importance of including NLO QCD SMEFT corrections in the $WZ$ analysis, while the effects on $WW$ production are smaller. We also show that the $\mathcal{O}(1/\Lambda^4)$ contributions dominate the analysis, where $\Lambda$ is the high energy scale associated with the SMEFT.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Anomalous triple gauge couplings in the light of dimension-8 operators in $W^+W^-$

    hep-ph 2026-07 conditional novelty 6.0 of 10

    Bosonic dimension-8 operators in γγ-initiated WW production dominate over qqbar and set the practical EFT validity scale, yielding validity-aware constraints on dimension-6 Wilson coefficients.

  2. Matrix element method at NLO: A fine proof of concept in POWHEG

    hep-ph 2026-06 unverdicted novelty 6.0 of 10

    Proof-of-concept for NLO matrix element method via POWHEG projections applied to fully leptonic WW production in SMEFT, demonstrating near-optimal classification of BSM versus SM events using lepton correlations.

  3. Electroweak Restoration: SMEFT and HEFT

    hep-ph 2026-05 unverdicted novelty 5.0 of 10

    High-energy amplitude ratios for longitudinal di-boson production approach unity in the SM and dimension-6 SMEFT but not necessarily in HEFT, making the W±_L Z_L to W±_L h cross section ratio a promising discriminator...

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