At natural values of parameters of the model dicussed, the contribution of the chromoelectric dipole moment of the s-quark to the neutron electric dipole moment (EDM) exceeds considerably the experimental upper limit for the neutron EDM. As strict bounds on the parameters of the model are derived from the atomic experiment with odd isotope of mercury.
@article{arxiv.hep-ph/9604212,
title = {Is the Model of Spontaneous CP-violation in the Higgs Sector Consistent with Experiment?},
author = {I. B. Khriplovich},
journal= {arXiv preprint arXiv:hep-ph/9604212},
year = {2014}
}