Nuclear electric dipole moment of 3He.

In the no-core shell model (NCSM) framework, we calculate the 3He electric dipole moment (EDM) generated by parity- and time-reversal violation in the nucleon-nucleon interaction. While the results are somehow sensitive to the interaction model chosen for the strong two- and three-body interactions, we demonstrate the pion-exchange dominance to the EDM of 3He, if the coupling constants for π, ρ and ω-exchanges are of comparable magnitude, as expected. Finally, our results suggest that a measurement of 3He EDM would be complementary to the currently planned neutron and deuteron experiments, and would constitute a powerful constraint to the models of the pion P- and T-violating interactions. [ABSTRACT FROM AUTHOR]