The establishment of the "neutrino oscillation" phenomenon provided explanation to both solar (θ12) and atmospheric (θ23) anomalies as well as two important predictions: a new neutrino oscillation (θ13) and possible CP-violation (CPV) phenomenology. All this physics is embedded in the PMNS neutrino mixing matrix — equivalent to the quark CKM matrix. The observation of θ13 took place in 2011-2012. A rather large θ13 was found and opened for the manifestation of CPV whose maximal amplitude could be up to 3 orders of magnitude larger than in the quark sector and being explored for the first time now. Large CPV is a key ingredient needed for our understanding of the Universe. However, our ability to challenge the Standard Model of Particle Physics via neutrino oscillations seems limited, even despite the major experimental advances expected in the 2020 decade with the JUNO, the DUNE and the Hyper-Kamiokande experiments. In this seminar, I shall focus on our possible ability to explore new physics via the precise experimental exploration of the Unitarity of the PMNS mixing matrix holding unique discovery potential sensitivity. A novel experimental scenario, for now called "Super Chooz”, is here described as possible next step to experimentally challenge Unitarity. This quest demands unprecedented experimental challenges beyond today’s technology reach, which appear viable only using the LiquidO novel detection technique. While still in an early explorative stage, a full preliminary hypothetical physics programme is highlighted, including sensitivity exploration of some channels.
SOM (Pilar Coloma)