Calculation of P, T-odd effects in 205TlF including electron correlation.

Introduction. The measurement of permanent electric dipole moments (EDM) of elementary particles is highly important for the theory of P, T-odd interactions. Experiments performed so far have given only upper bounds for the EDMs. The extraction of EDMs from measurements on molecules containing heavy atoms requires knowledge of nuclear and electronic properties of the molecule. High quality calculations of the relevant electronic properties are therefore essential for accurate determination of the EDMs [1, 2]. Here we consider the interaction of the proton EDM with the internal electromagnetic field of the 205 TlF molecule. This molecule is one of the best candidates for proton EDM measurements. Following Hinds and Sandars [3], the effective interaction with the proton EDM in TlF is written in the form