Speaker: Christoph Ternes
In this talk, I will first discuss the current status of three-neutrino oscillations. I will discuss the current determination of the neutrino oscillation parameters, and the status of the remaining unknowns: The octant of the atmospheric angle, CP violation and the neutrino mass ordering. In the second part I discuss neutrino oscillations in the presence of new very light and very heavy states. In the first case, superlight partners of the active neutrinos alter the neutrino oscillation probabilities. I discuss the current bounds on new mass splittings and new mixing angles and give an outlook how well the next generation experiments DUNE and JUNO could bound or measure these so called quasi-Dirac neutrinos. When, however, new states are very heavy the mixing matrix governing light neutrino mixing is not unitary anymore. I will discuss how well current experiments can bound the deviation from unitarity.