  The discovery made at the Large Hadron Collider (LHC) has revealed that the
spontaneous symmetry breaking mechanism is realised in a gauge theory such as
the Standard Model (SM) by at least one Higgs doublet. However, the possible
existence of other scalar bosons cannot be excluded. We analyze signatures
extensions of the SM, characterized by an extra representations of scalars, in
view of the recent and previous Higgs data. We show that such representations
can be probed and distinguished, mostly with multileptonic final states, with a
relatively low luminosity at the LHC.
