Global analysis of three-flavour neutrino oscillations: synergies and tensions in the determination of θ23, δCP, and the mass ordering

By I. Esteban, M. Gonzalez-Garcia, Álvaro Hernández-Cabezudo, M. Maltoni, T. Schwetz. Journal of High Energy Physics, 2018

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A bstractWe present the results of a global analysis of the neutrino oscillation data available as of fall 2018 in the framework of three massive mixed neutrinos with the goal at determining the ranges of allowed values for the six relevant parameters. We describe the complementarity and quantify the tensions among the results of the different data samples contributing to the determination of each parameter. We also show how those vary when combining our global likelihood with the χ2 map provided by Super-Kamiokande for their atmospheric neutrino data analysis in the same framework. The best fit of the analysis is for the normal mass ordering with inverted ordering being disfavoured with a Δχ2 = 4.7 (9.3) without (with) SK-atm. We find a preference for the second octant of θ23, disfavouring the first octant with Δχ2 = 4.4 (6.0) without (with) SK-atm. The best fit for the complex phase is δCP = 215° with CP conservation being allowed at Δχ2 = 1.5 (1.8). As a byproduct we quantify the correlated ranges for the laboratory observables sensitive to the absolute neutrino mass scale in beta decay, mνe$$ {m}_{\nu_e} $$ , and neutrino-less double beta decay, mee, and the total mass of the neutrinos, Σ, which is most relevant in Cosmology.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/ca3770028a06ad8d61b67a87e9e8a4db32b5358b

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Citations in the corpus

• Deep Underground Neutrino Experiment (DUNE), Far Detector Technical Design Report, Volume II: DUNE Physics (2020, positive): “Following suit, we drop GENIE’s default “Rv[n,p][1,2]pi” knobs and instead implement separate, uncorrelated uncertainties for all perturbations of 1, 2, and ≥ 3 pion final states, CC/NC, neutrinos/anti-neutrinos, and interactions on protons/neutrons, with the exception of CC neutrino 1-pion producti”
• A precision calculation of relic neutrino decoupling (2020, methodology): “From the global analysis of neutrino oscillation experiments in [30], we consider the following best-fit values of neutrino masses and mixing parameters, ( ∆m(2)21 10−5 eV2 , ∆m(2)31 10−3 eV2 , s(2)12, s 2 23, s 2 13 )”
• Baryogenesis from the weak scale to the grand unification scale (2020, background): “A recent global analysis found for the largest and smallest splitting (Esteban et al., 2019) matm ≡ √ |m23 −m21| = 49.9± 0.3 meV , msol ≡ √ |m22 −m21| = 8.6± 0.1 meV .”
• Where are we with light sterile neutrinos? (2019, methodology): “[22] — they are not reproduced here.”
• Status of light sterile neutrino searches (2019, background): “Due to the rather large (and potentially maximal) mixing angle sin(2)(2θ23) ∼ 1 [5], the atmospheric mass splitting ∆m(2)32 ' ∆m(2)31 ' 2.”
• Neutrino non-standard interactions: A status report (2019, background): “Most mixing parameters are measured quite precisely (better than 10% precision), some not as well (worse than 10% precision), and one parameter is virtually unknown: the CP-odd phase in the leptonic mixing matrix that can be probed via neutrino oscillations, often referred to as the Dirac phase [119”
• Long-baseline neutrino oscillation physics potential of the DUNE experiment (2020, neutral): “The entire complement of neutrino oscillation experiments to date has measured five of the neutrino mixing parameters [9–11]: the three mixing angles θ 12 , θ 23 , and θ 13 , and the two squared-mass differences Δ m and | Δ m 231 | , where Δ m 2 ij = m 2 i − m 2 j is the difference between the…”
• 2020 global reassessment of the neutrino oscillation picture (2020, neutral): “[9, 10].”
• NuFit-6.0: updated global analysis of three-flavor neutrino oscillations (2024, neutral): “[ 25, 37].”
• Theia: an advanced optical neutrino detector (2019, background): “These parameters have all been measured, with the exception of the value of the CP-violating phase, δCP [64], although the ordering of the mass states is also not completely determined.”