Limit on Non-Standard Interactions from the atmospheric neutrino data

We searched for non-standard neutrino interaction with the whole atmospheric neutrino data in Super-Kamiokande I and II. Neutrino oscillations in atmospheric neutrinos as well as that in the solar and reacter neutrinos play a very important role in particle physics because they present the evedence for physics beyond the standard model. Focussing on the existing atmospheric neutrino data, they are explained very well by νμ → ντ oscillation scheme, here we can use the robustness of the imprementation in order to obtain tight limits on a lot of mechanisms proposed alternative to the neutrino oscillations. Our main interest in this paper is on the placement of stringent limits on one possible alternative solution, non-standard neutrino interaction, in νμ → ντ sector with 2flavor atmospheric neutrino framework.