Neutron electric dipole moment from supersymmetric anomalous W-boson coupling

In the supersymmetric standard model (SSM) the W boson could have a nonvanishing electric dipole moment (EDM) through a one-loop diagram mediated by the charginos and neutralinos. Then the W-boson EDM induces the EDMs of the neutron and the electron. We discuss these EDMs, taking into consideration the constraints from the neutron and electron EDMs at the one-loop level induced by the charginos and squarks or sleptons. It is shown that the neutron and the electron could, respectively, have EDMs of the order of 10(-26)e cm and 10(-27)e cm, solely owing to the W-boson EDM. Since these EDMs do not depend on the values of the SSM parameters-for the squark or slepton sector, they provide less ambiguous predictions for CP violation in the SSM.