  The Ginzburg-Landau-Wilson theory that describes the disordered Fermi liquid
- d-wave superconductor phase transition at zero temperature is derived at weak
coupling. The theory represents an interacting dissipative system of bosonic
Cooper pairs in an effective random potential. I show that there exists a wide
crossover regime in the theory controlled by a line of Gaussian fixed points,
each of which in two dimensions is characterized by a different universal value
of the dc critical conductivity. Relation to experiments on overdoped and
underdoped cuprates is discussed.
