Precise Measurement of the Neutrino Mixing Parameter \theta_{23} from Muon Neutrino Disappearance in an Off-axis Beam
By K. Abe, J. Adam, H. Aihara, T. Akiri, C. Andreopoulos, S. Aoki, A. Ariga, T. Ariga, S. Assylbekov, D. Autiero and 329 more. 2014
213 citations recorded by the source corpus.
New data from the T2K neutrino oscillation experiment produce the most precise measurement of the neutrino mixing parameter theta_{23}. Using an off-axis neutrino beam with a peak energy of 0.6 GeV and a data set corresponding to 6.57 x 10^{20} protons on target, T2K has fit the energy-dependent nu_mu oscillation probability to determine oscillation parameters. Marginalizing over the values of other oscillation parameters yields sin^2 (theta_{23}) = 0.514 +0.055/-0.056 (0.511 +- 0.055), assuming normal (inverted) mass hierarchy. The best-fit mass-squared splitting for normal hierarchy is Delta m^2_{32} = (2.51 +- 0.10) x 10^{-3} eV^2/c^4 (inverted hierarchy: Delta m^2_{13} = (2.48 +- 0.10) x 10^{-3} eV^2/c^4). Adding a model of multinucleon interactions that affect neutrino energy reconstruction is found to produce only small biases in neutrino oscillation parameter extraction at current levels of statistical uncertainty.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/a70dde6f75d1c03d1c7d650ff2752ad0fed9f6e1
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In Nuclear and High Energy Physics
Citations in the corpus
- Updated fit to three neutrino mixing: status of leptonic CP violation (2014, background): “57× 1020 pot νμ-disappearance data [16], 16 data points.”
- Improved measurements of the neutrino mixing angle θ13 with the Double Chooz detector (2014, background): “10 × 10−3eV2 assuming normal hierarchy [36] (a consistent value is reported by the T2K experiment [37]).”