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It is a common feature of vector-like extensions of the electroweak sector tohave near degenerate states, such as electroweak doublets. In simplifiedmodels, it is usually assumed that these have decay widths saturated bytwo-body channels. As a consequence, experimental searches can be done focusingon only one of the states of the doublet. Taking as an example case the lightexotic electroweak doublet present in the Minimal Composite Higgs Model, weshow that including three-body decays in the pair production process makes thisseparation unfeasible, since both states of the doublet will be present andcontribute significantly to the signal. In addition, by recasting presentsearches in multileptonic channels, with a simplified cut-and-count analysis, arelevant increase in discovery reach or exclusion potential is obtained; thisindeed motivates a more detailed analysis. This study shows how an inclusivesearch strategy, taking into account both the near degeneracy and the presenceof three-body decays, will have greater discovery power and be more naturalfrom a model building perspective.

On the Importance of Three-Body Decays of Vector-Like Quarks