We report new constraints on flavor-changing non-standard neutrino interactions from the MINOS long-baseline experiment using $\nu_{ e}$ and $\bar{ \nu}_{ e}$ appearance candidate events from predominantly $\nu_{ \mu}$ and $\bar{ \nu}_{ \mu}$ beams. We used a statistical selection algorithm to separate $\nu_{ e}$ candidates from background events, enabling an analysis of the combined MINOS neutrino and antineutrino data. We observe no deviations from standard neutrino mixing, and thus place constraints on the non-standard interaction matter effect, $|\varepsilon_{ e\tau}|$, and phase, $(\delta_{ CP}+\delta_{ e\tau})$, using a thirty-bin likelihood fit.
Categories: hep-ex