The MINOS and MINOS+ experiment ran from 2005 until 2016 with two detectors at baselines of 1 km and 735 km exposed by the NuMI beam from Fermilab. The NuMI beam neutrino flux peaked at an energy of 3 GeV during the MINOS era in both ν µ and ν µ modes. The MINOS+ data were taken entirely in ν µ mode with a peak energy of 7 GeV. A study of three-flavour oscillations with the full MINOS sample and the first two years of data from MINOS+ measured ∆m 2 32 = (2.42 ± 0.09) × 10 −3 eV 2 assuming the Normal Hierarchy, and ∆m 2 32 = − 2.48−0.11 × 10 −3 eV 2 in the Inverted Hierarchy. Searches for both sterile neutrinos and sterile antineutrinos were performed with no significant evidence of a signal, hence exclusion limits were placed over six orders of magnitude of the sterile neutrino mass-splitting ∆m 2 41 . A joint analysis of the MINOS ν µ disappearance sample and the Daya Bay and Bugey-3 ν e disappearance samples excludes the LSND and MiniBooNE allowed regions for ∆m 2 41 < 0.8 eV 2 at 95% C.L.. Finally, an analysis searching for anomalous ν e appearance above 6 GeV in MINOS+ was used to set a limit on the allowed sterile neutrino parameter space.
A search for sterile neutrinos was performed by looking for muon neutrino disappearance using the MINOS/MINOS+ detectors. The two detectors are at baselines of 1.04 km and 735 km from the neutrino production target of the NuMI neutrino beam at Fermilab. The data exposure consists of 10.56×10 20 protons-on-target from a beam configuration with a neutrino energy distribution peaked at 3 GeV and a further 5.8×10 20 protons-on-target in a higher energy configuration with a beam peak energy of 7 GeV. A simultaneous analysis of the ν µ charged-current and neutralcurrent neutrino energy spectra in the two detectors, using a 3+1 sterile neutrino model, yields no evidence of sterile neutrino mixing. A world-leading limit on the sterile mixing angle sin 2 θ 24 is set for many values of the sterile neutrino mass-splitting ∆m 2 41 > 10 −4 eV 2 .
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