We report new constraints on flavor-changing non-standard neutrino interactions from the MINOS experiment, in which neutrino versus antineutrino interactions can be distinguished on an event-by-event basis. We analyzed a combined set of beam neutrino and antineutrino data from the well-understood NuMI beam, and found no evidence for deviations from standard neutrino mixing. The observed energy spectra constrain the non-standard neutrino interactions parameter to the range $-0.20<{\epsilon }_{\mu \tau }<0.07(90\%\mathrm{C}.\mathrm{L}.)$.

• Received 22 March 2013

DOI:https://doi.org/10.1103/PhysRevD.88.072011