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arXiv · 1702.04738

Nonmaximal $θ_{23}$ mixing at NOvA from neutrino decoherence

Joao A. B. Coelho·W. Anthony Mann·Saqib S. Bashar
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Abstract

In study of muon neutrino disappearance at 810 km, the NOvA experiment finds flavor mixing of the atmospheric sector to deviate from maximal ($\sin^2θ_{23} = 0.5$) by 2.6 $σ$. The result is in tension with the 295-km baseline measurements of T2K which are consistent with maximal mixing. We propose that $θ_{23}$ is in fact maximal, and that the disagreement is harbinger of environmentally-induced decoherence. The departure from maximal mixing can be accounted for by an energy-independent decoherence of strength $Γ= (2.3 \pm 1.1) \times 10^{-23}$ GeV.

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Joao A. B. Coelho, W. Anthony Mann, Saqib S. Bashar. 2017-05-03. Nonmaximal $θ_{23}$ mixing at NOvA from neutrino decoherence. https://doi.org/10.1103/physrevlett.118.221801

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