Spontaneous CP violation from high-dimensional operators

Darwin Chang, Chuan Hung Chen, Chao Qiang Geng

Research output: Contribution to journalArticlepeer-review


We investigate spontaneous CP violation that arises from high-dimensional operators in an effective Lagrangian with the symmetry group SU(3) × SU(2) × U(1) × Z7. We show that such a model does not necessarily require a very large scale Λ by simultaneously satisfying the constraints from the ∈ parameter in the neutral kaon system and the electric dipole moment (EDM) of the neutron. We find that the EDM of the electron in this model could be at the level of 10-27 ecm. However, the CP violating muon polarizations in η, KL → μ+ μ- decays are small.

Original languageEnglish
Pages (from-to)403-414
Number of pages12
JournalProgress of Theoretical Physics
Issue number2
Publication statusPublished - 1999 Feb

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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