Abstract
We report the final measurement of the neutrino oscillation parameters Δm_{32}^{2} and sin^{2}θ_{23} using all data from the MINOS and MINOS+ experiments. These data were collected using a total exposure of 23.76×10^{20} protons on target producing ν_{μ} and ν[over ¯]_{μ} beams and 60.75kt yr exposure to atmospheric neutrinos. The measurement of the disappearance of ν_{μ} and the appearance of ν_{e} events between the Near and Far detectors yields |Δm_{32}^{2}|=2.40_{-0.09}^{+0.08}(2.45_{-0.08}^{+0.07})×10^{-3} eV^{2} and sin^{2}θ_{23}=0.43_{-0.04}^{+0.20}(0.42_{-0.03}^{+0.07}) at 68%C.L. for normal (inverted) hierarchy.
Highlights
We report the final measurement of the neutrino oscillation parameters Δm232 and sin2 θ23 using all data from the MINOS and MINOSþ experiments
This Letter reports new measurements of Δm232 and sin2ðθ23Þ using the complete set of beam and atmospheric data taken with the MINOS detectors
Two distinct beam energy configurations of the NuMI neutrino beam at Fermi National Accelerator Laboratory corresponded to two phases of the MINOS (2005–2012) and MINOSþ (2013–2016) long-baseline, on-axis neutrino oscillation experiments
Summary
Far detectors yields jΔm232j 1⁄4 2.40−þ00..0098ð2.45þ−00..0087Þ × 10−3 eV2 and sin θ23 1⁄4 0.43−þ00..0240ð0.42þ−00..0037Þ at 68% C.L. for normal (inverted) hierarchy. The MINOS and MINOSþ long-baseline, on-axis neutrino oscillation experiments recorded two distinct phases of exposure to the NuMI neutrino beam [19] at Fermilab utilizing the MINOS Near and Far detectors [20]. Both detectors were functionally equivalent magnetized steelscintillator, tracking, sampling calorimeters. The MINOS νμ mode sample included an additional 0.15 × 1020 POT exposure in a high-energy νμ mode with a peak νμ energy of 9 GeV The analysis of this MINOS-phase data has been described previously, presenting a 37.88 kt yr sample of atmospheric neutrinos, measurements of both νμ and νμ disappearance, and νe and νe appearance [4,12,21,22]. The visible energy of the selected νμ and νμ events was reconstructed from the sum of the muon track and the νμ Events / 1017 POT
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