Measurement of Neutrino and Antineutrino Oscillations Using Beam and Atmospheric Data in MINOS

Abstract

We report measurements of oscillation parameters from νμ and ν⎯⎯μ disappearance using beam and atmospheric data from MINOS. The data comprise exposures of 10.71×1020 protons on target in the νμ-dominated beam, 3.36×1020 protons on target in the ν⎯⎯μ-enhanced beam, and 37.88 kton yr of atmospheric neutrinos. Assuming identical ν and ν⎯⎯ oscillation parameters, we measure |Δm2|=(2.41+0.09−0.10)×10−3 eV2 and sin2(2θ)=0.950+0.035−0.036. Allowing independent ν and ν⎯⎯ oscillations, we measure antineutrino parameters of |Δm⎯⎯⎯2|=(2.50+0.23−0.25)×10−3 eV2 and sin2(2θ⎯⎯)=0.97+0.03−0.08, with minimal change to the neutrino parameters.