This thesis documents the measurement of lifetime, width, mass, and
couplings to two electroweak bosons of the recently-discovered
Higgs boson using data from the CMS experiment at the Large Hadron
Collider. Both on-shell (at the mass of around 125 GeV) and
off-shell (above 200 GeV) Higgs boson production is studied and an
excess of off-shell production with significance above two standard
deviations is observed for the first time. The latter is a
qualitative new way to study the Higgs field, responsible for
generation of mass of all the known elementary particles. In
addition, phenomenological tools have been developed with the Monte
Carlo event generator and matrix element techniques for an optional
analysis of LHC data. Optimization of the CMS data with careful
alignment of the silicon tracker is also presented.
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