Neutrino oscillations refitted

TL;DR

This paper updates the global fit of neutrino oscillation parameters with recent experimental data, refining parameter estimates and enhancing sensitivity to the CP phase, thereby advancing understanding of neutrino properties.

Contribution

It provides the latest comprehensive analysis of neutrino oscillation data, incorporating recent experimental results to improve parameter constraints and explore CP violation effects.

Findings

Atmospheric mixing angle θ23 is consistent with maximal mixing.

Enhanced sensitivity to the CP phase due to combined accelerator and reactor data.

Updated global neutrino oscillation parameters with recent experimental inputs.

Abstract

Here we update our previous global fit of neutrino oscillations by including the recent results which have appeared since the Neutrino-2012 conference. These include the measurements of reactor anti-neutrino disappearance reported by Daya Bay and RENO, together with latest T2K and MINOS data including both disappearance and appearance channels. We also include the revised results from the third solar phase of Super-Kamiokande, SK-III, as well as new solar results from the fourth phase of Super-Kamiokande, SK-IV. We find that the preferred global determination of the atmospheric angle $\theta_{23}$ is consistent with maximal mixing. We also determine the impact of the new data upon all the other neutrino oscillation parameters with emphasis on the increasing sensitivity to the CP phase, thanks to the interplay between accelerator and reactor data. In the appendix we present the updated results obtained after the inclusion of new reactor data presented at the Neutrino 2014 conference. We discuss their impact on the global neutrino analysis.