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

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Gonzalez-Garcia, M. C., Maltoni, Michele, Schwetz, Thomas·2014·Journal of High Energy Physics

Abstract

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 θ 23 as well as the CP violating phase δ CP. The favored values of δ CP 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 Δχ 2 value by performing a Monte Carlo study of T2K data.

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Metadata

Authors
Gonzalez-Garcia, M. C., Maltoni, M., & Schwetz, T.
Venue
Journal of High Energy Physics
Published
2014-11
Volume
2014
Issue
11
ISSN
1029-8479 (ISSN-L)
OpenAlex
W2040017340
Cited by
539
References
1
FWCI
62.39
Type
journal article
Language
en
Open access
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CoChat. (2026). Citation check: Updated fit to three neutrino mixing: status of leptonic CP violation. https://app.cochat.ai/papers/10.1007/jhep11(2014)052
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Gonzalez-Garcia, M. C., Maltoni, M., & Schwetz, T. (2014). Updated fit to three neutrino mixing: status of leptonic CP violation. Journal of High Energy Physics. https://doi.org/10.1007/jhep11(2014)052

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