Neutron electric dipole moment: Constituent dressing and compositeness - art. no. 025204

Contributions to the neutron's electric dipole moment (EDM), d(n), are calc ulated using a well-constrained ansatz for the nucleon's Poincare covariant Fadde'ev amplitude. The momentum-dependent quark dressing amplifies the co ntribution from the current-quarks' EDMs, and dressed-quark confinement and binding make distinguishable the effect of the two CP and T violating inte ractions: i gamma (5)sigma (mu nu)(p(1)-p(2))(nu) and gamma (5)(p(1) + p(2) )(mu), where p(1.2) are the current-quarks' momenta. The value of \d(n)\ ob tained using the current-quark EDMs generated by a minimal three Higgs doub let model of spontaneous CP violation is close to the current experimental upper bound.