Computing Nucleon Electric Dipole Moment from lattice QCD

TL;DR

This paper reviews recent lattice QCD calculations of the nucleon electric dipole moment induced by the QCD theta term, which is crucial for understanding CP violation beyond the Standard Model.

Contribution

It provides an overview of recent advancements in lattice QCD methods for computing the nucleon EDM related to the QCD theta term.

Findings

Progress in lattice calculation techniques

Improved estimates of the nucleon EDM from the theta term

Enhanced understanding of CP violation in QCD

Abstract

Electric dipole moments (EDMs) of nucleons and nuclei are actively considered as direct evidence of the CP violation. Calculations of nucleon EDMs on lattice are required to connect the quark- and hadron- level effective CP violating interactions within QCD or other CP violating sources in new physics beyond the standard model. Among them, the theta-induced nucleon EDM, that is the only such renormalizable interaction, has widely been investigated on a lattice. In the report, we review recent developments of the lattice calculations of nucleon EDM induced QCD theta term.