Perturbative calculations of P, T-odd effects in heavy polar diatomic molecules

Abstract

A fully-relativistic second order many-body perturbation theory (MBPT(2)) is employed to compute the P, T-odd interaction constant Wd of the ground (2Σ1/2) states of YbF and BaF molecules. Since MBPT(2) incorporates the correlation and relaxation effects in a balanced manner, we expect that the present estimates of Wd will be important to provide a reliable limit on the electron's electric dipole moment (EDM) de. © 2007 IOP Publishing Ltd.