Anomalous quartic gauge couplings and unitarization for the vector boson scattering process $pp\rightarrow W^+W^+jjX\rightarrow \ell ^+\nu _\ell \ell ^+\nu _\ell jjX$
2018
Weak
vector bosonscattering (VBS) at the LHC provides an excellent source of information on the structure of quartic gauge couplings and possible effects of physics beyond the SM in electroweak symmetry breaking. Parameterizing deviations from the SM within an
effective field theoryat tree level, the dimension-8 operators, which are needed for sufficiently general modeling, lead to unphysical enhancements of cross sections within the accessible energy range of the LHC. Preservation of
unitaritylimits is needed for phenomenological studies of the VVjj events which signify VBS. Here we develop a numerical
unitarizationscheme for the full off-shell VBS processes and apply it to same-sign W scattering, i.e. processes like \(qq\rightarrow qqW^+W^+\). The scheme is implemented within the Monte Carlo program VBFNLO, including leptonic decay of the weak bosons and NLO QCD corrections. Distributions differentiating between higher
dimensional operatorsare discussed.
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