CP Asymmetry discovery with an Enhanced Reconstruction algorithm for Neutrinos in Super- and Hyper-Kamiokande – CAVERNS

The CAVERNS project aims to boost the very first discovery of CP violation in the lepton sector at the current and incoming neutrino water Cherenkov detectors.
CP violation in the lepton sector is the most promising way to explain the matter/antimatter asymmetry in our current universe through leptogenesis. In the last 10 years, the T2K and Super-Kamiokande experiments have provided world-leading constraints on the neutrino mass ordering and CP violation. However, this sensitivity is essentially limited by their event reconstruction algorithm, especially above the GeV scale. Moreover, this very same reconstruction algorithm has been shown to be unusable for the incoming generation of neutrino observatory, Hyper-Kamiokande, which aims to make the first 5 sigma observation of CP violation from 2027.

With CAVERNS, I propose to build a coherent framework, based on a new reconstruction algorithm that will analyze the Hyper-Kamiokande very first data and provide the very first 5 sigma discovery of CP violation. CAVERNS will be used and tested beforehand to boost the T2K and Super-Kamiokande sensitivities to set the first 3 sigma constraints on CP violation and neutrino mass ordering in the incoming years.
Beyond the 4 years of this project, CAVERNS is aims to become the cornestone that will support Hyper-Kamiokande world-leading neutrino physics in the incoming decade, from the very precise measurement of CP violation phase to constrain leptogenesis models, lepton generation symmetries, test the PMNS unitarity or conduct world-leading tests of Grand Unified Theories. It finally aims to support other future neutrino water Cherenkov telescope such as KM3NeT.