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

We perform a combined fi t 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 di ff erences arising between the consistent combination of the data samples from accelerator and reactor experiments compared to partial combinations. We quantify the con fi dence in the determination of the less precisely known parameters theta(23), delta(CP), and the neutrino mass ordering by performing a Monte Carlo study of the long baseline accelerator and reactor data. We fi nd that the sensitivity to the mass ordering and the theta(23) octant is below 1 sigma. Maximal theta(23) mixing is allowed at slightly more than 90% CL. The best fi t for the CP violating phase is around 270 degrees, CP conservation is allowed at slightly above 1 sigma, and values of delta(CP) similar or equal to 90 degrees are disfavored at around 99% CL for normal ordering and higher CL for inverted ordering.