An NLO QCD effective field theory analysis of $W_{}^{+}{W}_{}^{-}$ production at the LHC including fermionic operators

Abstract

We study the impact of anomalous gauge boson and fermion couplings on the production of $W^{+}{W}^{-}$ pairs at the LHC. Helicity amplitudes are presented separately to demonstrate the sources of new physics contributions and the impact of QCD and electroweak corrections. The QCD corrections have important effects on the fits to anomalous couplings, in particular when one $W$ boson is longitudinally polarized and the other is transversely polarized. In effective field theory language, we demonstrate that the dimension-6 approximation to constraining new physics effects in $W^{+}{W}^{-}$ pair production fails at $p_T\sim 500-1000$ GeV.

23 pages, version published in journal, code posted at https://quark.phy.bnl.gov/Digital_Data_Archive/dawson/ww_2017/WWEFT_NLO.tar.gz

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• Model-independent precision constraints on dimension-6 operators
• Helicity Selection Rules and Non-Interference for BSM Amplitudes
• Anomalous Triple Gauge Couplings in the Effective Field Theory Approach at the LHC
• Novel measurements of anomalous triple gauge couplings for the LHC
• Next-to-leading-order electroweak corrections to the production of four charged leptons at the LHC
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• Electroweak input schemes and universal corrections in SMEFT
• Diboson production in the SMEFT from gluon fusion
• To Profile or To Marginalize -- A SMEFT Case Study
• Electroweak Restoration at the LHC and Beyond: The $Vh$ Channel
• Dimension-eight Operator Basis for Universal Standard Model Effective Field Theory
• Electroweak corrections and EFT operators in $W^{+}{W}^{-}$ production at the LHC
• Role of polarizations and spin-spin correlations of $W^{\prime }s$ in $e^{-}{e}^{+}\to W^{-}{W}^{+}$ at $\sqrt{s}=250$ GeV to probe anomalous $W^{-}{W}^{+}Z/\gamma$ couplings
• Polarized-boson pairs at NLO in the SMEFT
• Optimal sensitivity of anomalous charged triple gauge couplings through $W$ boson helicity at the $e^{+}{e}^{-}$ colliders
• From Models to SMEFT and Back?
• Threshold resummation for $W$-boson pair production at NNLO+NNLL
• Gluon-gluon fusion contribution to the productions of three gauge bosons at the LHC