Muon Neutrino Disappearance Measurement at MINOS+

Abstract

We report new measurements of neutrino oscillation parameters from the MINOS+ experiment using the first two years of accelerator beam exposure combined with the complete set of accelerator and atmospheric data from MINOS. The analysis combined ν_µ disappearance and ν_e appearance data using the three-flavor oscillation formalism. Our results give the confidence limits \(\left| {\Delta m_{32}^2} \right| = \left[ {2.33 - 2.51} \right] \times {10^{ - 3}}{\rm{ e}}{{\rm{V}}^2}\) (68% C.L.) and sin² θ ₂₃ = 0.35 − 0.65 (90% C.L.) for normal hierarchy, and \(\left| {\Delta m_{32}^2} \right| = \left[ {2.37 - 2.57} \right] \times {10^{ - 3}}{\rm{ e}}{{\rm{V}}^2}\) (68% C.L.) and sin² θ ₂₃ = 0.35 − 0.66 (90% C.L.) for inverted hierarchy.