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In this work we study the phenomenology of the process $pp\to W^+W^-jj$ atthe LHC, in the scenario of the resonant vector boson scattering subprocess$W^+W^-\to W^+W^-$ which we describe within the effective field theoryframework of the Electroweak Chiral Lagrangian. We assume a stronglyinteracting electroweak symmetry breaking sector in which dynamically generatedresonances with masses in the TeV scale appear as poles in the ElectroweakChiral Lagrangian amplitudes unitarized with the Inverse Amplitude Method. Therelevant resonance here, $V_0$, is the neutral component of the triplet ofvector resonances which are known to emerge dynamically at the TeV scale forspecific values of the Electroweak Chiral Lagrangian parameters. With the aimof studying the production and possible observation of $V^0$ at the LHC, viathe resonant $W^+W^-\to W^+W^-$ scattering, a MadGraph~5 UFO model has beendeveloped employing a phenomenological Proca Lagrangian as a practical tool tomimic the correct $V^0$ properties that are predicted with the InverseAmplitude Method. We choose to study the fully hadronic decay channel of thefinal gauge bosons $W W\to J(jj)J(jj)$ since it leads to larger event rates andbecause in the alternative leptonic decay channels the presence of neutrinoscomplicates the reconstruction of the resonance properties. In this context,the 2 boosted jets from the $W$ hadronic decays, $jj$, are detected as a singlefat jet, $J$, due to their extreme collinearity. We perform a dedicatedanalysis of the sensitivity to these vector resonances $V^0$ with massesbetween 1.5 and 2.5 TeV at the LHC with $\sqrt{s}=13$ TeV and the planned highluminosity of 3000 ${\rm fb}^{-1}$, paying special attention to the study ofefficient cuts to extract the resonant vector boson fusion signal from the QCDbackground, which clearly represents the main challenge of this search.

Dynamical vector resonances from the EChL in VBS at the LHC: the WW case