Electric dipole moment of the neutron in supersymmetric theories

We reexamine the dipole electric moment of the neutron $d_n$ in supersymmetric theories. We reassess the contributions to $d_n$ from Weinberg's gluonic operator and the color and electric dipole operators, emphasizing the proper evaluation of their QCD correction factors, and see that $d_n$ is a very sensitive probe of these theories. We also give a calculation of the phase that determines $d_n$ in realistic models and conclude that the dominant contribution to $d_n$ is expected to be due to strong (and not weak) $\mathrm{CP}$-violating effects.