  Vector-boson fusion (VBF) is a clean probe of the electroweak-symmetry
breaking (EWSB), which inevitably suffers from some level of contamination due
to the gluon fusion (ggF). In addition to the jet variables used in the current
experimental analysis, we analyze a few more jet-shape variables defined by the
girth and integrated jet-shape. Taking $H\to W W^* \to e \nu \mu \nu$ and $H
\to \gamma\gamma$ as examples, we perform the analysis with a new technique of
2-step boosted-decision-tree method, which significantly reduces the
contamination of the ggF in the VBF sample, thus, providing a clean environment
in probing the EWSB sector.
