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

Abstract

We report measurements of oscillation parameters from $\hat{I}{½}_{mu}$ and $\bar{\hat{I}}{½}_{\hat{I}}¼$ disappearance using beam and atmospheric data from MINOS. The data comprise exposures of \unit[$10.71\times 10^{20}$]{protons on target (POT)} in the $\hat{I}{½}_{\hat{I}}¼$-dominated beam, $\unit[3.36\times10^{20}]{POT}}$ in the $\bar{\hat{I}}{½}_{\hat{I}}¼$-enhanced beam, and 37.88 kton-years of atmospheric neutrinos. Assuming identical $\hat{I}½$ and $\bar{\hat{I}}½$ oscillation parameters, we measure \mbox{$|Δm^2}| = \unit[2.41^{+0.09}_{-0.10}) \times 10^{-3}]{eV^{2}}$} and $\sin^{2}/!/left(2θ\right) = 0.950^{+0.035}_{-0.036}$. Allowing independent $\hat{I}½$ and $\bar{\hat{I}}½$ oscillations, we measure antineutrino parameters of $|Δ\bar{m}^2| = \unit[(2.50 ^{+0.23}_{-0.25}) \times 10^{-3}]{eV^{2}}$ and $\sin^{2}/!/left(2\barθ \right) = 0.97^{+0.03}_{-0.08}$, with minimal change to the neutrino parameters.

5 pages, 3 figures