New Physics can be manifest at the high intensity frontier through a vast array of phenomena, which includes rare processes (forbidden in the Standard Model), or tiny deviations from the Standard Model’s expectations. Rare flavour transitions in both hadron and lepton sectors, as well as CP violating observables, have been shown to be formidable tools to discover New Physics.
Muons are very powerful and versatile probes of New Physics - numerous experiments rely on the study of “muon channels” to search for processes violating lepton number, charged lepton flavours, or even the universality of lepton flavours.
Likewise, the study of electric dipole moments opens a unique window towards new sources of CP violation, rendering searches for the electron and the neutron EDM very sensitive probes of physics beyond the Standard Model.
Following a short overview of the status of dedicated experimental searches, we comment on how these observables can shed light on the underlying model of New Physics at work, allowing to falsify it and/or to probe NP scales which are otherwise unreachable.
With the foreseen improvements in experimental sensitivity, accompanied by phenomenological studies, the coming years offer very
exciting prospects concerning flavour physics and CP violation.