TEST OF TIME-REVERSAL INVARIANCE USING NEUTRONS

Measurements of neutron electric dipole moment (EDM) have provided the most strict and reliable upper limit on T-violating interactions. It is well known that neutron EDM is sensitive to theoretical models which explain the CP-violation in K-meson. Another approach to T-violation using neutrons is the measurement of T-odd term in p-wave neutron capture reactions in the incident energy region of about eV. In the compound states formed by the p-wave neutron capture reactions, an enhancement of T-violating interaction is theoretically predicted based on the interference of two opposite parity amplitudes. A brief review of neutron EDM measurements and an overview of T-violation experiment in eV-neutron capture reactions are given.