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We study the indirect effects of new physics on the phenomenology of therecently discovered "Higgs-like" particle. In a model independent frameworkthese effects can be parametrized in terms of an effective Lagrangian at theelectroweak scale. In a theory in which the SU(2)_L x U(1)_Y gauge symmetry islinearly realized they appear at lowest order as dimension--six operators,containing all the SM fields including the light scalar doublet, with unknowncoefficients. We discuss the choice of operator basis which allows us to makebetter use of all the available data on the new state, triple gauge bosonvertex and electroweak precision tests, to determine the coefficients of thenew operators. We illustrate our present knowledge of those by performing aglobal fit to the existing data which allows simultaneous determination of theeight relevant parameters quantifying the Higgs couplings to gluons,electroweak gauge bosons, bottom quarks, and tau leptons. We find that for allscenarios considered the standard model predictions for each individual Higgscoupling and observable are within the corresponding 68% CL allowed range. Wefinish by commenting on the implications of the results for unitarity ofprocesses at higher energies. Note added: The analysis has been updated withall the public data available by October 2013. Updates of this analysis areprovided at http://hep.if.usp.br/Higgs as well as new versions of thismanuscript.

Robust Determination of the Higgs Couplings: Power to the Data