First measurement of muon-neutrino disappearance in NOvA

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Date
2016-03-25
Authors
Adamson, P.
Ader, C.
Andrews, M.
Anfimov, N.
Anghel, I.
Arms, K.
Arrieta-Diaz, E.
Aurisano, A.
Ayres, D. S.
Backhouse, C.
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Abstract
This paper reports the first measurement using the NOvA detectors of νμ disappearance in a νμ beam. The analysis uses a 14 kton-equivalent exposure of 2.74×1020 protons-on-target from the Fermilab NuMI beam. Assuming the normal neutrino mass hierarchy, we measure Δm322=(2.52-0.18+0.20)×10-3 eV2 and sin2θ23 in the range 0.38-0.65, both at the 68% confidence level, with two statistically degenerate best-fit points at sin2θ23=0.43 and 0.60. Results for the inverted mass hierarchy are also presented.
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Physical Review D. v.93(5)