Supersymmetric Baryogenesis from Exotic Quark Decays

TL;DR

This paper proposes a new mechanism for baryogenesis using exotic squark decays in a supersymmetric model, which could be tested at colliders and EDM experiments.

Contribution

It introduces a novel baryogenesis scenario involving TeV-scale exotic squark decays with baryon and CP violation in the superpotential, independent of supersymmetry breaking CP violation.

Findings

Model constraints from phenomenology are discussed.

Potential signals at the LHC and EDM experiments are identified.

Exotic squarks can serve as messengers of gauge-mediated supersymmetry breaking.

Abstract

In a simple extension of the minimal supersymmetric standard model, out-of-equilibrium decays of TeV scale exotic vector-like squarks may generate the baryon asymmetry of the universe. Baryon number and CP violation are present in the superpotential, so this mechanism does not rely on CP violation in supersymmetry breaking parameters. We discuss phenomenological constraints on the model as well as potential signals for the Large Hadron Collider and electronic dipole moment experiments. A variation on the TeV scale model allows the exotic squarks to be the messengers of gauge mediated supersymmetry breaking.