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First measurement of muon-neutrino disappearance in NOvA
Anghel, I. Ayres, D. S. Dharmapalan, R. Colo, M. Devan, A. Liu, J. Mathis, M. Nelson, J. K. Radovic, A. Vahle, P.
Anghel, I.
Ayres, D. S.
Dharmapalan, R.
Colo, M.
Devan, A.
Liu, J.
Mathis, M.
Nelson, J. K.
Radovic, A.
Vahle, P.
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 x 10(20) protons-on-target from the Fermilab NuMI beam. Assuming the normal neutrino mass hierarchy, we measure Delta m(32)(2) = (2.52(-0.18)(+0.20)) x 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.
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2016-01-01
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Physics
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https://doi.org/10.1103/PhysRevD.93.051104