Updated fit to three neutrino mixing: status of leptonic CP violation
Abstract
We present a global analysis of solar, atmospheric, reactor and accelerator neutrino data in the framework of threeneutrino 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 1 σ (3 σ) 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 ∆χ^{2} ≃6. We comment on the nontrivial task to assign a confidence level to this ∆ χ ^{2} value by performing a Monte Carlo study of T2K data.
 Publication:

Journal of High Energy Physics
 Pub Date:
 November 2014
 DOI:
 10.1007/JHEP11(2014)052
 arXiv:
 arXiv:1409.5439
 Bibcode:
 2014JHEP...11..052G
 Keywords:

 Neutrino Physics;
 Solar and Atmospheric Neutrinos;
 High Energy Physics  Phenomenology;
 High Energy Physics  Experiment
 EPrint:
 28 pages, 10 figures, 1 table. Typos corrected. Updated results of the global fit will be available at http://www.nufit.org/