Publications associated with T2K

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

Physical Review D American Physical Society 99 (2019) 071103

P Dunne, S Emery-Schrenk, A Ereditato, P Fernandez, T Feusels, AJ Finch, GA Fiorentini, G Fiorillo, C Francois, M Friend, Y Fujii, A Knight, A Knox, T Kobayashi, L Koch, T Koga, A Konaka, LL Kormos, Y Koshio, K Kowalik, H Kubo, Y Kudenko, R Kurjata, T Kutter, M Kuze

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)×10^20 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^2θ24 for the sterile neutrino mass splitting Δm^2v41<3×10^−3eV^2/c^4.

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