Updated fit to three neutrino mixing: exploring the accelerator-reactor complementarity

  • Ivan Esteban
  • M. C. Gonzalez-Garcia
  • Michele MaltoniEmail author
  • Ivan Martinez-Soler
  • Thomas Schwetz
Open Access
Regular Article - Theoretical Physics


We perform a combined fit to global neutrino oscillation data available as of fall 2016 in the scenario of three-neutrino oscillations and present updated allowed ranges of the six oscillation parameters. We discuss the differences arising between the consistent combination of the data samples from accelerator and reactor experiments compared to partial combinations. We quantify the confidence in the determination of the less precisely known parameters θ 23, δ CP, and the neutrino mass ordering by performing a Monte Carlo study of the long baseline accelerator and reactor data. We find that the sensitivity to the mass ordering and the θ 23 octant is below 1σ. Maximal θ 23 mixing is allowed at slightly more than 90% CL. The best fit for the CP violating phase is around 270°, CP conservation is allowed at slightly above 1σ, and values of δ CP ≃ 90° are disfavored at around 99% CL for normal ordering and higher CL for inverted ordering.


Neutrino Physics Solar and Atmospheric Neutrinos 


Open Access

This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.


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Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits use, duplication, adaptation, distribution, and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Authors and Affiliations

  • Ivan Esteban
    • 1
  • M. C. Gonzalez-Garcia
    • 1
    • 2
    • 3
  • Michele Maltoni
    • 4
    Email author
  • Ivan Martinez-Soler
    • 4
  • Thomas Schwetz
    • 5
  1. 1.Departament de Fisíca Quàntica i Astrofísica and Institut de Ciencies del CosmosUniversitat de BarcelonaBarcelonaSpain
  2. 2.Institució Catalana de Recerca i Estudis Avançats (ICREA)BarcelonaSpain
  3. 3.C.N. Yang Institute for Theoretical PhysicsState University of New York at Stony BrookStony BrookU.S.A.
  4. 4.Instituto de Física Teórica UAM/CSICUniversidad Autónoma de MadridMadridSpain
  5. 5.Institut für KernphysikKarlsruher Institut für Technologie (KIT)KarlsruheGermany

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