Vector Boson Scattering at High Mass at the LHC

With present and upcoming colliders like the Tevatron and the LHC (Large Hadron Collider), the origin of electroweak symmetry breaking (EWSB) will be explored up to the TeV scale. In the absence of a light Higgs boson (SM or supersymmetry) vector boson scattering will be the best probe for the study of the mechanism of EWSB. Here a Chiral Lagrangian (ChL) Model, inspired by pion scattering, is used to extrapolate to what may happen at LHC energies in such case. This scenario is explored with simulation tools to evaluate the sensitivity of the ATLAS detector to new physics.