Lepton-flavour violation in a Pati-Salam model with gauged flavour symmetry

Understand

Combining Pati-Salam (PS) and flavour symmetries in a renormalisable setup, we devise a scenario which produces realistic masses for the charged leptons.

• Flavour-symmetry breaking scalar fields in the adjoint representations of the PS gauge group are responsible for generating different flavour structures for up- and down-type quarks as well as for leptons.
• The model is characterised by new heavy fermions which mix with the Standard Model quarks and leptons.
• In particular, the partners for the third fermion generation induce sizeable sources of flavour violation.