  This review is based on the talk presented at the SUSY 2012 (Beijing). The
new particle around 125 GeV observed at the Large Hadron Collider (LHC) is
almost consistent with the standard model Higgs boson, except that the diphoton
decay mode may be excessive. We summarize a number of possibilities. While at
the LHC the dominant production mechanism for the Higgs boson of the standard
model and some other extensions is via the gluon fusion process, the
alternative vector-boson fusion is more sensitive to electroweak symmetry
breaking. Using the well known dijet-tagging technique to single out the
vector-boson fusion mechanism, we investigate potential of vector-boson fusion
to discriminate a number of models suggested to give an enhanced inclusive
diphoton production rate.
