Supersymmetry and the neutron electric dipole moment

The dimension-six CP-violating operator fabcGaμνGbνρGcρμ, recently proposed by Weinberg as the dominant contribution to the neutron electric dipole moment dn, cannot be supersymmetrized but will occur in the low-energy effective Lagrangian when supersymmetry is spontaneously broken. However, the dimension-five quark electric dipole moment and the quark color electric dipole moment operators contribute to dn even at one loop and become the dominant contributions, though the Weinberg contribution is still quite large