  The Standard Model of electroweak interactions has one scalar doublet. The
minimal extension of this sector is effected by adding a neutral, singlet
scalar field. Depending on whether the singlet field has a non-zero vacuum
expectation value, x, or not, the scenario has quite distinctive predictions.
In particular, x unequal to 0 produces a mixing between the usual SU(2) doublet
and the singlet, giving rise to two physical states and a goldstone boson with
non-vanishing coupling to these. Presence of this coupling modifies the 2 jets
+ missing energy signal of the Bjorken process at LEP. We update the bounds on
the Higgs mass using the LEP-1 data. We then explore, using parton-level Monte
Carlo event generators, the production of these scalars at the LHC via
gluon-gluon fusion and subsequent detection. We compare the signals with the
expected backgrounds.
