Flavourful baryon and lepton number violation at the LHC

TL;DR

This paper explores how flavor symmetries in the Standard Model suppress baryon and lepton number violation at low energies but allow for observable resonant processes at the LHC involving multiple fermions from all three generations.

Contribution

It provides a model-independent classification of flavor-violating transitions and identifies two promising signatures for detection at the LHC.

Findings

Suppression of baryon and lepton number violation at low energies due to flavor symmetries.

Identification of two clean LHC signatures:  t    and  t   + jets.

Framework for analyzing flavor-violating processes in collider experiments.

Abstract

We observe that the flavour symmetries of the Standard Model gauge sector, broken as they are in the Standard Model Yukawa Lagrangian, naturally suppress baryon and lepton number violation at low energies and, simultaneously, make it accessible at the LHC through resonant processes involving at least six fermions from all three generations. We establish a model independent classification of such transitions and identify two classes that give rise to particularly clean LHC signatures, namely $\bar t \mu^+ e^+$ and $\bar t \bar t$ + jets.