The Super-Kamiokande and T2K collaborations present a joint measurement of neutrino oscillation parameters from their atmospheric and beam neutrino data. A common neutrino interaction model has been developed for the events of the two experiments which overlap in energy, and correlations between their detector systematic uncertainties were evaluated. Using 3244.4 days of atmospheric data and a beam exposure of respectively 19.7E20 and 16.3E20 protons on target in neutrino and antineutrino running modes, we find an exclusion of the CP-conserving value of the Jarlskog invariant with a significance varying between 1.9σ and 2.0σ depending on the analysis considered, a limited preference for the normal mass ordering (MO), and no strong preference for the θ23 octant.
arXiv preprint : https://arxiv.org/pdf/2405.12488
