Search for light sterile neutrinos with the T2K far detector Super-Kamiokande at a baseline of 295 km

We perform a search for light sterile neutrinos using the data from the T2K far detector at a baseline of 295 km, with an exposure of 14.7(7.6)×1020 protons on target in neutrino (antineutrino) mode. A selection of neutral-current interaction samples is also used to enhance the sensitivity to sterile mixing. No evidence of sterile neutrino mixing in the 3+1 model was found from a simultaneous fit to the charged-current muon, electron and neutral-current neutrino samples. We set the most stringent limit on the sterile oscillation amplitude sin^2\theta_{24} for the sterile neutrino mass splitting \Delta m^2_{41}<3\times 10^{-3}  eV^2/c^4.

link to publication : https://journals.aps.org/prd/abstract/10.1103/PhysRevD.99.071103

There is a data release for this paper here

• arXiv preprint: https://arxiv.org/abs/1902.06529
• Data release: https://t2k-experiment.org/results/data-release-for-measurement-of-the-muon-neutrino-charged-current-single-pi-production-on-hydrocarbon-using-the-t2k-off-axis-near-detector-nd280/
• DOI: https://doi.org/10.1103/PhysRevD.99.071103
• Reference: Phys.Rev.D 99 (2019) 7, 071103