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

Authors

K. Abe, The University of Tokyo
R. Akutsu, The University of Tokyo
A. Ali, Università degli Studi di Padova
C. Andreopoulos, University of Liverpool
L. Anthony, University of Liverpool
M. Antonova, CSIC-UV - Instituto de Física Corpuscular
S. Aoki, Kobe University
A. Ariga, University of Bern
Y. Ashida, Kyoto University
Y. Awataguchi, Tokyo Metropolitan University
Y. Azuma, Osaka City University
S. Ban, Kyoto University
M. Barbi, University of Regina
G. J. Barker, University of Warwick
G. Barr, University of Oxford
C. Barry, University of Liverpool
M. Batkiewicz-Kwasniak, Henryk Niewodniczanski Institute of Nuclear Physics of the Polish Academy of Sciences
F. Bench, University of Liverpool
V. Berardi, Politecnico di Bari
S. Berkman, The University of British Columbia
R. M. Berner, University of Bern
L. Berns, Tokyo Institute of Technology
S. Bhadra, York University
S. Bienstock, Sorbonne Universite
A. Blondel, Université de Genève
S. Bolognesi, Institut de Recherche sur les Lois Fondamentales de l'Univers
B. Bourguille, Institut de Física d'Altes Energies, Bellaterra
S. B. Boyd, University of Warwick

Document Type

Article

Publication Date

4-1-2019

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 14.7(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 sin2θ24 for the sterile neutrino mass splitting Δm412<3×10-3 eV2/c4.

Publication Source (Journal or Book title)

Physical Review D

Recommended Citation

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., Barr, G., Barry, C., Batkiewicz-Kwasniak, M., Bench, F., Berardi, V., Berkman, S., Berner, R., Berns, L., Bhadra, S., Bienstock, S., Blondel, A., Bolognesi, S., Bourguille, B., & Boyd, S. (2019). Search for light sterile neutrinos with the T2K far detector Super-Kamiokande at a baseline of 295 km. Physical Review D, 99 (7) https://doi.org/10.1103/PhysRevD.99.071103