Abstract

We calculate the electric dipole form factor of the neutron in a perturbative chiral quark model, parameterizing CP violation of generic origin by means of effective electric dipole moments of the constituent quarks and their CP-violating couplings to the chiral fields. We discuss the relation of these effective parameters to more fundamental ones such as the intrinsic electric and chromoelectric dipole moments of quarks and the Weinberg parameter. From the existing experimental upper limits on the neutron electric dipole moment, we derive constraints on these CP-violating parameters. © 2006 IOP Publishing Ltd.