Current unknowns in the three-neutrino framework

By Francesco Capozzi, E. Lisi, A. Marrone, A. Palazzo. Progress in Particle and Nuclear Physics, 2018

240 citations recorded by the source corpus.

We present an up-to-date global analysis of data coming from neutrino oscillation and non-oscillation experiments, as available in April 2018, within the standard framework including three massive and mixed neutrinos. We discuss in detail the status of the three-neutrino (3nu) mass-mixing parameters, both known and unknown. Concerning the latter, we find that: normal ordering (NO) is favored over inverted ordering (IO) at 3sigma level; the Dirac CP phase is constrained within ~15% (~9%) uncertainty in NO (IO) around nearly-maximal CP-violating values; the octant of the largest mixing angle and the absolute neutrino masses remain undetermined. We briefly comment on other unknowns related to theoretical and experimental uncertainties (within 3nu) or possible new states and interactions (beyond 3nu).

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/3149d5a4f6aa3f987761c91d6deb0c37871d5b89

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Citations in the corpus

• NuFit-6.0: updated global analysis of three-flavor neutrino oscillations (2024, unknown): “Although in the last years some efforts are being put forward by the experimental collaborations for combined analysis of their results [1–3], the main task still falls on the work of phenomenological groups [4–6].”
• Modular S4 models of lepton masses and mixing (2018, methodology): “[2] and the Gaussian approximation for δm 2 and ∆m2.”
• Flavor structures of charged fermions and massive neutrinos (2019, methodology): “Given the convention of |Ue1| > |Ue2| or equivalently cos θ12 > sin θ12 [313] 15, a global analysis of currently available neutrino (antineutrino) oscillation data has led us to Table 9 [85, 86], from which one can observe two possibilities for the neutrino mass spectrum:”
• Neutrino physics with the PTOLEMY project: active neutrino properties and the light sterile case (2019, unknown): “22) × 10−2 for normal (inverted) ordering [37] (see also [38, 39]).”
• The fate of hints: updated global analysis of three-flavor neutrino oscillations (2020, background): “Global fits to neutrino oscillation data in the last several years have shown persistent hints for the normal neutrino mass ordering and values of the CP phase δCP around maximal CP violation [1–6].”