Connecting Leptonic CP Violation, Lightest Neutrino Mass and Baryon Asymmetry Through Type II Seesaw
| Autor: | Rupam Kalita, Debasish Borah |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Physics
Nuclear and High Energy Physics Particle physics Dirac (video compression format) High Energy Physics::Phenomenology FOS: Physical sciences Astronomy and Astrophysics Computer Science::Computational Geometry Mass matrix Atomic and Molecular Physics and Optics High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) Baryon asymmetry Seesaw mechanism Seesaw molecular geometry Leptogenesis CP violation High Energy Physics::Experiment Neutrino |
| Popis: | We study the possibility of connecting leptonic Dirac CP phase $\delta$, lightest neutrino mass and baryon asymmetry of the Universe within the framework of a model where both type I and type II seesaw mechanisms contribute to neutrino mass. Type I seesaw gives rise to Tri-Bimaximal (TBM) type neutrino mixing whereas type II seesaw acts as a correction in order to generate non-zero $\theta_{13}$. We derive the most general form of type II seesaw mass matrix which can not only give rise to correct neutrino mixing angles but also can generate non-trivial value of $\delta$. Considering both the cases where type II seesaw is sub-leading and is equally dominant compared to type I seesaw, we correlate the type II seesaw term with $\delta$ and lightest neutrino mass. We further constrain the Dirac CP phase $\delta$ and hence the type II seesaw mass matrix from the requirement of producing the observed baryon asymmetry through the mechanism of leptogenesis. Comment: 22 pages, 15 figures, to appear in IJMPA |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|