Lepto-axiogenesis with light right-handed neutrinos

• DOI: 10.48550/arxiv.2402.10263
• Publication Date: 2024-02-15
• Authors: P. D. Barnes; Raymond T. Co; Keisuke Harigaya; Aaron Pierce
• Keywords: Right handed

We study lepto-axiogenesis in theories where the right-handed neutrino is light enough that its dynamics affect determination of baryon asymmetry. When compared with high-scale Majorana mass may be treated as an effective dimension-five operator, we find predicted saxion lower. Two distinct scenarios emerge. In first, processes generate asymmetry are equilibrium down to neutrino. second, relevant never reach equilibrium; number freezes in. comment on implications for supersymmetric spectra and discuss constraints late decays relics from dark radiation. contrast lepto-axiogenesis, which predicts superpartners masses 10-100 TeV or more, this scenario consistent a wider range superpartner masses, all way current direct search bounds.