Updated fit to three neutrino mixing: status of leptonic CP violation

By M. Gonzalez-Garcia, M. Maltoni, T. Schwetz. Journal of High Energy Physics, 2014

504 citations recorded by the source corpus.

We present a global analysis of solar, atmospheric, reactor and accelerator neutrino data in the framework of three-neutrino oscillations based on data available in summer 2014. We provide the allowed ranges of the six oscillation parameters and show that their determination is stable with respect to uncertainties related to reactor neutrino and solar neutrino flux predictions. We find that the maximal possible value of the Jarlskog invariant in the lepton sector is 0.033 ±0.010 (±0.027) at the 1σ (3σ) level and we use leptonic unitarity triangles to illustrate the ability of global oscillation data to obtain information on CP violation. We discuss “tendencies and tensions” of the global fit related to the octant of θ23 as well as the CP violating phase δCP. The favored values of δCP are around 3π/2 while values around π/2 are disfavored at about Δχ2 ≃6. We comment on the non-trivial task to assign a confidence level to this Δχ2 value by performing a Monte Carlo study of T2K data.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/afc2d5c45fae0c873eaec2f82e9f9ca64c68f341

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Nuclear and High Energy Physics

1. M. Drewes
2. Z. Xing
3. Julien Lesgourgues
4. M. Shaposhnikov
5. S. Pastor
6. A. Ringwald
7. M. Tórtola
8. J. Redondo

Citations in the corpus

• Invited review: Physics potential of the ICAL detector at the India-based Neutrino Observatory (INO) (2015, background): “1 summarises the current status of neutrino oscillation parameters [50, 51] based on the world neutrino data that was available after the NOW 2014 conference.”
• Global constraints on absolute neutrino masses and their ordering (2017, unknown): “Such a format has been adopted in presenting the oscillation parameter ranges in [11,41] and is extended herein to nonoscillation parameters.”
• Exploring New Models in All Detail with SARAH (2015, background): “There is an overwhelming experimental evidence that neutrinos have masses and do mix among each other; see [50] and references therein.”
• Neutrino Oscillations and Non-standard Interactions (2017, methodology): “Prior to the publication of the antineutrino run data from T2K, combined analyses were already showing a weak preference for δ = 3 π/ 2, while δ = π/ 2 was disfavored above the 2 σ level [108–110].”
• Flavor structures of charged fermions and massive neutrinos (2019, methodology): “Figure 20: An illustration of three Dirac unitarity triangles of the PMNS matrix U in the complex plane, plotted by inputting the best-fit values of θ12, θ13, θ23 and δ [459] in the normal mass ordering (NMO, left panel) or inverted mass ordering (IMO, right panel) case.”
• Global Analyses of Neutrino Oscillation Experiments (2015, methodology): “[27,44] for discussions and a Monte Carlo studies.”
• Long-Baseline Neutrino Facility (LBNF) and Deep Underground Neutrino Experiment (DUNE) Conceptual Design Report Volume 2: The Physics Program for DUNE at LBNF (2015, methodology): “Given the current best-fit values of the mixing angles [4] and assuming normal hierarchy, JPMNS CP ≈ 0.”
• A White Paper on keV sterile neutrino Dark Matter (2016, background): “The consistent determination of these leptonic parameters requires a global analysis of the data described above which, at present, is in the hands of a few phenomenological groups [84, 112, 113].”
• Updated results on neutrino mass and mass hierarchy from cosmology with Planck 2018 likelihoods (2019, background): “See [10–15] for results from other global analyses.”
• Non-unitarity, sterile neutrinos, and non-standard neutrino interactions (2016, unknown): “[60] centered around their true values.”