/ hep-ex FERMILAB-PUB-16-007-ND

First measurement of muon-neutrino disappearance in NOvA

Pages: 8

Abstract: This paper reports the first measurement using the NOvA detectors of $\nu_\mu$ disappearance in a $\nu_\mu$ beam. The analysis uses a 14 kton-equivalent exposure of $2.74 \times 10^{20}$ protons-on-target from the Fermilab NuMI beam. Assuming the normal neutrino mass hierarchy, we measure $\Delta m^{2}_{32}=(2.52^{+0.20}_{-0.18})\times 10^{-3}$ eV$^{2}$ and $\sin^2\theta_{23}$ in the range 0.38-0.65, both at the 68% confidence level, with two statistically-degenerate best fit points at $\sin^2\theta_{23} =$ 0.43 and 0.60. Results for the inverted mass hierarchy are also presented.

Note: *Temporary entry*; 8 pages, 6 figures. Submitted to Phys. Rev. D Rapid Communications

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