Global status of neutrino oscillation parameters after Neutrino-2012

TL;DR

This paper updates the global analysis of neutrino oscillation parameters incorporating recent experimental data, notably establishing a large value for θ13 and refining measurements of θ23, significantly advancing understanding of neutrino mixing.

Contribution

It provides the first comprehensive global fit after Neutrino-2012, integrating new reactor and long-baseline data to precisely determine neutrino oscillation parameters.

Findings

θ13 is significantly large, with sin^2θ13 ≈ 0.025

θ13 is excluded at more than 10σ from zero

Refined measurements of θ23 and other parameters

Abstract

Here we update the global fit of neutrino oscillations in arXiv:1103.0734 and arXiv:1108.1376 including the recent measurements of reactor antineutrino disappearance reported by the Double Chooz, Daya Bay and RENO experiments, together with latest MINOS and T2K appearance and disappearance results, as presented at the Neutrino-2012 conference. We find that the preferred global fit value of $\theta_{13}$ is quite large: $\sin^2\theta_{13} \simeq 0.025$ for normal and inverted neutrino mass ordering, with $\theta_{13} = 0$ now excluded at more than 10$\sigma$. The impact of the new $\theta_{13}$ measurements over the other neutrino oscillation parameters is discussed as well as the role of the new long-baseline neutrino data and the atmospheric neutrino analysis in the determination of a non-maximal atmospheric angle $\theta_{23}$.