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Advances in High Energy Physics
Volume 2015, Article ID 820941, 13 pages
Research Article

Constraints on the Nonstandard Interaction in Propagation from Atmospheric Neutrinos

Department of Physics, Tokyo Metropolitan University, Minami-Osawa, Hachioji, Tokyo 192-0397, Japan

Received 3 May 2015; Accepted 5 August 2015

Academic Editor: Vincenzo Flaminio

Copyright © 2015 Shinya Fukasawa and Osamu Yasuda. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The publication of this article was funded by SCOAP3.


The sensitivity of the atmospheric neutrino experiments to the nonstandard flavor-dependent interaction in neutrino propagation is studied under the assumption that only nonvanishing components of the nonstandard matter effect are the electron and tau neutrino components , and , and that the tau-tau component satisfies the constraint which is suggested from the high energy behavior for atmospheric neutrino data. It is shown that the Super-Kamiokande (SK) data for 4438 days constrains at 2.5 (98.8%) CL whereas the future Hyper-Kamiokande experiment for the same period of time as SK will constrain as at 2.5CL from the energy rate analysis and the energy spectrum analysis will give even tighter bounds on and .