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Physical Review D 99, 071103(R) (2019)

ISSN: 2470-0010, SCI

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

N. T. Hong Van et al. (T2K Collaboration)

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.

DOI: 10.1103/PhysRevD.99.071103