Vector boson scattering (VBS), with its intricate cancellation between Higgs and electroweak boson exchanges, has in recent years advanced from theoretical consideration to experimental investigation at the LHC. Via its sensitivity to quartic gauge couplings, it has opened new roads to BSM searches.
The talk will first consider such BSM effects in an effective field theory (EFT) language, including the unitarity problems of a truncated EFT, as a bottom-up approach. This will be contrasted to a top-down approach, within a large class of UV-complete, i.e. renormalizable models of BSM physics. The top-down approach allows to quantify the validity range of the EFT, it sheds light on unitarization procedures, but above all it suggests improved strategies for BSM searches in VBS.
Dieter Zeppenfeld (KIT): EFT effects in VBS: lessons from UV complete models
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