Excited lepton baryogenesis

TL;DR

This paper proposes a novel baryogenesis mechanism utilizing excited leptons, called leptomesons, which interact with Standard Model particles without conflicting with neutrino mass constraints or proton stability, and are testable at colliders.

Contribution

It introduces a new baryogenesis mechanism based on leptomesons, linking excited leptons to the matter-antimatter asymmetry in the universe.

Findings

Leptomesons can generate baryon asymmetry without contradicting neutrino mass constraints.

The proposed mechanism is compatible with proton stability.

Potential for experimental verification at collider experiments.

Abstract

The excited leptons that share the quantum numbers with the Standard Model leptons but have larger masses are widespread in many promising new physics theories. A subclass of excited leptons that at low energies interact with the SM fermions dominantly through the effective coupling to lepton and fermion-antifermion pair can be referred as leptomesons. I introduce possible generation of the baryon asymmetry of the universe using these new particles. The discussed baryogenesis mechanisms do not contradict to the small neutrino masses and the proton stability, and can be interesting for the collider experiments.