Quantification of the hadronic CP violation contribution to the atomic EDMs

TL;DR

This paper reviews recent progress in quantifying how hadronic CP violation, particularly from the Weinberg operator, contributes to atomic electric dipole moments, advancing understanding of CP violation beyond the standard model.

Contribution

It summarizes recent efforts to quantify hadronic CP violation effects on atomic EDMs, focusing on the Weinberg operator within effective field theory.

Findings

Progress in quantifying Weinberg operator contribution to atomic EDMs

Near completion of the leading order analysis of hadronic CP violation effects

Enhanced understanding of CP violation sources beyond the standard model

Abstract

CP violating interactions are required to realize the matter abundance of our Universe. It is however known that the standard model of particle physics does not contain sufficient CP violation. The electric dipole moment (EDM) of atomic systems is a very sensitive experimental probe of CP violation beyond the standard model, and it is very actively studied in experiments. The atomic EDM has a significant sensitivity to hadronic CP violation, but its quantification has for long been obstructed by the nonperturbative physics of quantum chromodynamics. Quite recently, the contribution of the Weinberg operator (CP violating three-gluon interaction) to the atomic EDM has been analyzed, and we are almost attaining the quantification era of the CP violating hadronic interaction in the leading order of standard model effective field theory. In this proceedings contribution, we summarize the current attempt to quantify the hadronic CP violation contribution to the EDM of atoms.