Theory of electric dipole moments and lepton flavour violation

TL;DR

This paper discusses how electric dipole moments and lepton flavour violation serve as sensitive probes for new physics, emphasizing the importance of precise, model-independent analysis including nuclear and QCD uncertainties.

Contribution

It provides a framework for interpreting high-precision measurements of EDMs and lepton flavour violation in a largely model-independent way, accounting for theoretical uncertainties.

Findings

Highlights the sensitivity of EDMs and lepton flavour violation to new physics.

Emphasizes the importance of including nuclear and QCD uncertainties.

Provides a methodology for relating measurements to fundamental parameters.

Abstract

Electric dipole moments and charged-lepton flavour-violating processes are extremely sensitive probes for new physics, complementary to direct searches as well as flavour-changing processes in the quark sector. Beyond the "smoking-gun" feature of a potential significant measurement, however, it is crucial to understand their implications for new physics models quantitatively. The corresponding multi-scale problem of relating the existing high-precision measurements to fundamental parameters can be approached model-independently to a large extent; however, care must be taken to include the uncertainties from especially nuclear and QCD calculations properly.