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 14.7ð7.6Þ × 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 þ 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 sin2 θ24 for the sterile neutrino mass splitting Δm2 41 < 3 × 10−3 eV2=c4.

Search for light sterile neutrinos with the T2K far detector Super-Kamiokande at a baseline of 295 km / Abe, K., Akutsu, R., Ali, A., Andreopoulos, C., Anthony, L., Antonova, M., Aoki, S., Ariga, A., Ashida, Y., Awataguchi, Y., Azuma, Y., Ban, S., Barbi, M., Barker, G.J., Barr, G., Barry, C., Batkiewicz-Kwasniak, M., Bench, F., Berardi, V., Berkman, S., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 99:7(2019). [10.1103/PhysRevD.99.071103]

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

De Rosa G.;Fiorillo G.;Palladino V.;Riccio C.;Ruggeri A. C.;
2019

Abstract

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 14.7ð7.6Þ × 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 þ 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 sin2 θ24 for the sterile neutrino mass splitting Δm2 41 < 3 × 10−3 eV2=c4.
2019
Search for light sterile neutrinos with the T2K far detector Super-Kamiokande at a baseline of 295 km / Abe, K., Akutsu, R., Ali, A., Andreopoulos, C., Anthony, L., Antonova, M., Aoki, S., Ariga, A., Ashida, Y., Awataguchi, Y., Azuma, Y., Ban, S., Barbi, M., Barker, G.J., Barr, G., Barry, C., Batkiewicz-Kwasniak, M., Bench, F., Berardi, V., Berkman, S., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 99:7(2019). [10.1103/PhysRevD.99.071103]
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