The T2K experiment has performed a search for νe disappearance due to sterile neutrinos using 5.9×1020 protons on target for a baseline of 280 m in a neutrino beam peaked at about 500 MeV. A sample of νe CC interactions in the off-axis near detector has been selected with a purity of 63% and an efficiency of 26%. The p-value for the null hypothesis is 0.085 and the excluded region at 95% C.L. is approximately sin22θee>0.3 for Δmeff2>7eV2/c4.
Publication Source (Journal or Book title)
Physical Review D - Particles, Fields, Gravitation and Cosmology
Abe, K., Adam, J., Aihara, H., Akiri, T., Andreopoulos, C., Aoki, S., Ariga, A., Assylbekov, S., Autiero, D., Barbi, M., Barker, G., Barr, G., Bartet-Friburg, P., Bass, M., Batkiewicz, M., Bay, F., Berardi, V., Berger, B., Berkman, S., Bhadra, S., Blaszczyk, F., Blondel, A., Bojechko, C., Bolognesi, S., Bordoni, S., Boyd, S., Brailsford, D., & Bravar, A. (2015). Search for short baseline νe disappearance with the T2K near detector. Physical Review D - Particles, Fields, Gravitation and Cosmology, 91 (5) https://doi.org/10.1103/PhysRevD.91.051102