We review the current status of the study of parity and time invariance violation in atoms, nuclei and molecules. We focus on parity nonconservation (PNC) in cesium (CS) and three of the most promising areas of research: (i) PNC in a chain of isotopes, (ii) search for nuclear anapole moments, and (iii) search for permanent electric dipole moments (EDMs) of atoms and molecules, which in turn are caused by either an electron EDM or nuclear T, P-odd moments such as a nuclear EDM or nuclear Schiff moment.
Apart from the pd reaction also the scattering of antiprotons with transversal polarization PPY on deuterons with tensor polarization Pxz provides a null-test signal for time-reversal-invariance violating but parity conserving effects. Assuming that the time-reversal-invariance violating N̅N interaction contains the same operator structure as the NN interaction, we discuss the energy dependence of the null-test signal in p̅d scattering on the basis of a calculation within the spin-dependent Glauber theory at beam energies of 50-300 MeV.
The integrated cross section [Formula: see text] for a special type of double polarized proton-deuteron scattering constitutes a null test for time-invariance violating but P-parity conserving effects. Using Glauber theory for the [Formula: see text] elastic scattering and different types of phenomenological T-odd P-even NN-interactions we show that the contribution of the lowest mass meson exchange, i.e. the [Formula: see text]-meson, to the null-test signal [Formula: see text] vanishes. Variation of the cross section [Formula: see text] due to strong hadronic and Coulomb interaction is studied and its energy dependence is calculated in the GeV region.
PARITY VIOLATION AND ELECTRIC DIPOLE MOMENTS IN ATOMS AND MOLECULES
