CP VIOLATION IN η → μ⁺μ⁻

We investigate a CP violating observable, the μ-polarization, in η → μ⁺μ⁻ in several models with the standard gauge group. The CP violating parameters are constrained by the experimental upper bound on the neutron electric dipole moment. Among the models considered here, it was found that those with leptoquark scalars dominate the contributions to μ-polarization in η → μ⁺μ⁻. μ-polarization can be of order 10⁻³.