Electric dipole moment enhancement factor of thallium

TL;DR

This paper calculates the electric dipole moment enhancement factor of thallium using high-precision methods, resolving previous discrepancies and providing a more accurate value that aligns with earlier studies.

Contribution

The study offers a refined and more accurate calculation of the thallium EDM enhancement factor, addressing previous controversies and including previously omitted corrections.

Findings

EDM enhancement factor of Tl = -573(20)

Value is 20% larger than recent results by Nataraj et al.

Results agree well with earlier studies.

Abstract

The goal of this work is to resolve the present controversy in the value of the EDM enhancement factor of Tl. We have carried out several calculations by different high-precision methods, studied previously omitted corrections, as well as tested our methodology on other parity conserving quantities. We find the EDM enhancement factor of Tl to be equal to -573(20). This value is 20% larger than the recently published result of Nataraj et al. [Phys. Rev. Lett. 106, 200403 (2011)], but agrees very well with several earlier results.