Baryogenesis via Sterile neutrino oscillation and neutrino parameters

✍ Scribed by Takehiko Asaka; Hiroyuki Ishida

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 232 KB
• Volume: 64
• Category: Article
• ISSN: 0146-6410
• DOI: 10.1016/j.ppnp.2009.12.056

✦ Synopsis

We investigate baryogenesis in the νMSM which is the Minimal Standard Model (MSM) extended by three right-handed neutrinos with Majorana masses being smaller than the weak scale. In this model three sterile neutrinos, which are almost right-handed states, play important roles in cosmology. The baryon asymmetry of the universe (BAU) is generated via mechanism through flavor oscillation between two sterile neutrinos N 2 and N 3 which are degenerate in masses. We consider the case when BAU is solely originated from the CP violating phases in the mixing matrix of active neutrinos, i.e., the Dirac phase δ and the Majorana phase η, and study how BAU depends on these CP violating phases.