ZZ and Zgamma still haven't found what they are looking for

Abstract

Neutral diboson processes are precise probes of the Standard Model (SM) of particle physics, which entail high sensitivity to new physics effects. We identify in terms of dimension-8 effective operators the leading departures from the SM that survive in neutral diboson processes at high-energy, and which interfere with the unsuppressed SM helicity contributions. We describe symmetries and selections rules that single out those operators, both for weakly and strongly coupled physics beyond the SM. Finally, we show that unitarity and causality enforce, via dispersion relations, positivity constraints on the coefficients of these effective operators, reducing the parameter space which is theoretically allowed.

7 pages, 2 figures

References in corpus (13)

• Causality, Analyticity and an IR Obstruction to UV Completion
• ZZ production at hadron colliders in NNLO QCD
• A Periodic Table of Effective Field Theories
• Helicity Selection Rules and Non-Interference for BSM Amplitudes
• Search for high-mass diphoton resonances in proton-proton collisions at 13 TeV and combination with 8 TeV search
• Symmetries, Sum Rules and Constraints on Effective Field Theories
• Novel measurements of anomalous triple gauge couplings for the LHC
• Dispersion Relation Bounds for pi pi Scattering
• $ZZ$ production at the LHC: NNLO predictions for $2\ell 2\nu$ and $4\ell$ signatures
• ZZ production in gluon fusion at NLO matched to parton-shower
• The Other Fermion Compositeness
• Anomalous triple-gauge-boson interactions in vector-boson pair production with RECOLA2
• Higgs Couplings at High Scales

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