Nonmaximal $\theta_{23}$ mixing at NOvA from neutrino decoherence
| Autor: | Coelho, Joao A. B., Mann, W. Anthony, Bashar, Saqib S. |
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| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | Phys. Rev. Lett. 118, 221801 (2017) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevLett.118.221801 |
| Popis: | In study of muon neutrino disappearance at 810 km, the NOvA experiment finds flavor mixing of the atmospheric sector to deviate from maximal ($\sin^2\theta_{23} = 0.5$) by 2.6 $\sigma$. The result is in tension with the 295-km baseline measurements of T2K which are consistent with maximal mixing. We propose that $\theta_{23}$ 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 $\Gamma = (2.3 \pm 1.1) \times 10^{-23}$ GeV. Comment: 5 pages, 2 figures, accepted for publication in Physical Review Letters |
| Databáze: | arXiv |
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