EVAluation of the Equivalent Vector Boson Approximation at highest energy colliders

Abstract

Collider processes at the highest available partonic center-of-mass energies - 10 TeV and above - exhibit a new regime of electroweak interactions where electroweak gauge bosons mostly act as quasi-massless partons in vector boson fusion processes. We scrutinize these processes using the Equivalent Vector boson Approximation (EVA) based on its implementation in the Monte Carlo generator framework Whizard. Using a variety of important physics processes, including top pairs, Higgs pairs, neutrino pairs, and vector boson pairs, we study the behavior of processes initiated by transverse and longitudinal vector bosons, both $W$ and $Z$ induced. By considering several distributions for each process, we conclude that: there is no universal, process-independent prescription which minimizes the discrepancies between EVA- and matrix-element-based predictions; even by resorting to process-by-process prescriptions, we typically observe significant observable-dependent effects; the uncertainties associated with parameter dependencies in the EVA can be as large as $\mathcal{O}$(100%), and can only possibly be reduced by careful process-dependent kinematical selections.

26 pages, 15 figures, v2: version published in JHEP

References in corpus (25)

• Generating Feynman Diagrams and Amplitudes with FeynArts 3
• WHIZARD: Simulating Multi-Particle Processes at LHC and ILC
• The Implementation of the Minimal Supersymmetric Standard Model in FeynArts and FormCalc
• Fully differential VBF Higgs production at NNLO
• CEPC Technical Design Report -- Accelerator (v2)
• High Energy Leptonic Collisions and Electroweak Parton Distribution Functions
• Vector boson fusion at multi-TeV muon colliders
• Event Generators for High-Energy Physics Experiments
• High-Energy Vector Boson Scattering after the Higgs Discovery
• The Effective Vector Boson Approximation in High-Energy Muon Collisions
• Anomalous quartic gauge couplings and unitarization for the vector boson scattering process $pp\to W^{+}{W}^{+}jjX\to {\ell }^{+}{\nu }_{\ell }{\ell }^{+}{\nu }_{\ell }jjX$
• Probing the Scattering of Equivalent Electroweak Bosons
• Transversal Modes and Higgs Bosons in Electroweak Vector-Boson Scattering at the LHC
• Isolating Vector Boson Scattering at the LHC: gauge cancellations and the Equivalent Vector Boson Approximation vs complete calculations
• NLO QCD Predictions for off-shell $t\bar{t}$ and $t\bar{t}H$ Production and Decay at a Linear Collider
• Fully-differential Top-Pair Production at a Lepton Collider: From Threshold to Continuum
• Equivalent photons in proton-proton and ion-ion collisions at the LHC
• NLO Electroweak Corrections to Multi-Boson Processes at a Muon Collider
• Exploring the Quantum Universe: Pathways to Innovation and Discovery in Particle Physics
• Parallel Adaptive Monte Carlo Integration with the Event Generator WHIZARD
• Scattering of W and Z Bosons at High-Energy Lepton Colliders
• Simple, Parallel, High-Performance Virtual Machines for Extreme Computations
• Like-Sign W-Boson Scattering at the LHC -- Approximations and Full Next-to-Leading-Order Predictions
• Double Higgs Production in Vector Boson Fusion at NLO QCD in HEFT
• Precision phenomenology at multi-TeV muon colliders