Weak vector boson scattering at high energies will be one of the key measurements
in current and upcoming LHC runs. It is most sensitive to any new physics associated
with electroweak symmetry breaking. However, a conventional EFT analysis will fail at
To address this problem, we present a parameter-free prescription valid for arbitrary
perturbative and non-perturbative models: the T-matrix unitarization. We describe
its implementation as an asymptotically consistent reference model matched to the
low-energy effective theory.
We study typical observables of vector-boson scattering at the LHC in our unitarized
framework. For many strongly-coupled models like composite Higgs models, dimension-
8 operators might be actually the leading operators. In addition to those longitudinal
and transversal dimension eight EFT operators, the effects of generic tensor and scalar
resonances within a simplified model are considered.