Theory of oscillations and sterile neutrinos

11th International Conference on Hyperons, Charm and Beauty Hadrons

Palazzo, Antonio^1

Max-Planck-Institut für Physik (Werner Heisenberg Institut), Föhringer Ring 6, Munchen

80805, Germany^1

关键词: CP violations;    Electron neutrino;    Global data;    Neutrino fluxes;    Neutrino oscillations;    Sterile neutrinos;    Systematic uncertainties;    Upper limits;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/556/1/012062/pdf
DOI  :  10.1088/1742-6596/556/1/012062

来源: IOP

【 摘 要 】

We present a concise review of the theoretical status of neutrino oscillations within the (standard) 3-flavor framework and the (non-standard) 4-flavor scheme endowed with one additional sterile species (the so-called 3+1 scheme). We emphasize the slight overall preference that recently emerged for CP-violation in the 3-flavor analysis and highlight the unique role of the global data combination in the near future. After a brief introduction of the motivations for light (eV) sterile neutrinos, we discuss the bounds on their mixing with the electron neutrinos, attainable from the solar sector. The upper limit so obtained is independent of the reactor neutrino fluxes, whose calculations are affected by systematic uncertainties not completely under control. Finally, we highlight the possibility to explore sub-eV "super-light" sterile neutrinos exploiting the θ13-dedicated reactor experiments also commenting on the robustness of the 3- flavor results within the enlarged 3+1 scheme.