  After the discovery of the Higgs boson at the LHC, it is natural to start the
research program on the precision study of the Higgs-boson couplings to various
standard model (SM) particles. We provide a generic framework for the
deviations of the couplings from their SM values by introducing a number of
parameters. We show that a large number of models beyond the SM can be covered,
including two-Higgs-doublet models, supersymmetric models, little-Higgs models,
extended Higgs sectors with singlets, and fourth generation models. We perform
global fits to the most updated data from CMS, ATLAS, and Tevatron under
various initial conditions of the parameter set. In particular, we have made
explicit comparisons between the fitting results BEFORE and AFTER the Moriond
2013 meetings. Highlights of the results include: (i) the nonstandard decay
branching ratio of the Higgs boson is less than 22%; (ii) the most efficient
way to achieve the best fit for the data before the Moriond update is to
introduce additional particle contributions to the triangular-loop functions of
H\gamma\gamma and Hgg vertices; (iii) the 1\sigma allowed range of the relative
coupling of HVV is 1.01 +0.13 -0.14, which means that the electroweak-symmetry
breaking contribution from the observed Higgs boson leaves only a small room
for other Higgs bosons; (iv) the current data do not rule out pseudoscalar
couplings nor pseudoscalar contributions to the H\gamma\gamma and Hgg vertices;
and (v) the SM Higgs boson provides the best fit to all the current Higgs data.
