12-18 June 2016
Lund University
Europe/Zurich timezone

Effective Field Theory and Unitarity in Vector Boson Scattering

Not scheduled
Lund University

Lund University

Sandgatan 2, Lund, Sweden
Talk Electroweak physics at hadron colliders Electroweak


Marco Sekulla (Karlsruhe Institute of Technology)


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
high energies.

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.

Primary author

Marco Sekulla (Karlsruhe Institute of Technology)


Jürgen Reuter (DESY Hamburg, Germany) Thorsten Ohl (Würzburg University) Wolfgang Kilian (Siegen University)

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