P-VIOLATION AND T-VIOLATION FROM CERTAIN DIMENSION-8 WEINBERG OPERATORS

Dimension-eight operators of the Weinberg type have been shown to give important contributions to CP-violating phenomena, such as the electr ic dipole moment of the neutron. In this Rapid Communication we show h ow operators related to these (and expected to occur on an equal footi ng) can give rise to time-reversal-violating phenomena such as atomic electric dipole moments. We also estimate the induced parity-violating phenomena such as small ''wrong'' parity admixtures in atomic states and find that they are negligible.