On the role of leptonic CPV phases in cLFV observables

TL;DR

This paper investigates how leptonic CP violating phases influence charged lepton flavor violation processes, revealing their significant impact on observable rates and potential to alter correlations between different cLFV observables.

Contribution

It demonstrates that leptonic CP violating phases can significantly affect cLFV rates, a novel insight extending their known role in lepton number violating processes.

Findings

CP violating phases can modify cLFV rates

Potential loss of correlations between cLFV observables

Implications for future experimental searches

Abstract

In extensions of the Standard Model by Majorana fermions, the presence of additional CP violating phases has been shown to play a crucial role in lepton number violating processes. In this work we show that (Dirac and Majorana) CP violating phases can also lead to important effects in charged lepton flavour violating (cLFV) transitions and decays, in some cases with a significant impact for the predicted rates of cLFV observables. We conduct a thorough exploration of these effects in several cLFV observables, and discuss the implications for future observation. We emphasise how the presence of leptonic CP violating phases might lead to modified cLFV rates, and to a possible loss of correlation between cLFV observables.