Simple models with both baryon and lepton number violation by two units

TL;DR

This paper introduces simple, renormalizable extensions of the standard model with baryon and lepton number violation of two units, involving additional scalars, and discusses their experimental constraints.

Contribution

It presents the first minimal models with  and  violation by two units, including detailed phenomenological analysis.

Findings

Models contain a color singlet and a colored sextet scalar.

Baryon number violation observable only if scalars are within a few TeV.

Models are strongly constrained by LHC, LEP, and flavor physics.

Abstract

We construct simple renormalizable extensions of the standard model where the leading baryon number violating processes have $\Delta B = \pm \Delta L = -2$. These models contain additional scalars. The simplest models contain a color singlet and a colored sextet. For such baryon number violation to be observed in experiments, the scalars cannot be much heavier than a few TeV. We find that such models are strongly constrained by LHC physics, LEP physics, and flavor physics.