Resonant Forbidden CP Asymmetry from Soft Leptons
Resonant Forbidden CP Asymmetry from Soft Leptons
To explain the baryon asymmetry in the early universe via leptogenesis, quantum corrections to new particles are commonly invoked to generate the necessary CP asymmetry. We demonstrate, however, that a large CP asymmetry can already arise from Standard Model leptons. The mechanism relies on resummation of soft leptons at finite …