  After the discovery of a new resonance, its couplings to the Standard Model
(SM) need to be described by the means of an effective theory, appropriately
constructed to separate its mass scale from the mass scales associated with the
SM decay products. At the example of a scalar resonance transforming as a
singlet under the SM gauge group, we construct the operator basis for such a
theory using the language of Soft-Collinear Effective Theory (SCET) and perform
the resummation of the leading Sudakov logarithms.
