Relating CP-violating decays to the neutron EDM

Abstract

We use the present upper bound on the neutron electric dipole moment to give an estimate for the upper limit of the CP-violating couplings of the $\eta ({\eta }^{\prime })$ meson to the neutron. Using this result, we derive constraints on the CP-violating two-pion decays of the $\eta ({\eta }^{\prime })$. Our results are relevant for the running and planned GlueX and LHCb measurements of rare meson decays.

Comments: NSTAR 2017 conference proceedings