Hints of θ13 > 0 from global neutrino data analysis

Nailing down the unknown neutrino mixing angle theta(13) is one of the most important goals in current lepton physics. In this context, we perform a global analysis of neutrino oscillation data, focusing on theta(13), and including recent results [Neutrino 2008, Proceedings of the XXIII International Conference on Neutrino Physics and Astrophysics, Christchurch, New Zealand, 2008 (unpublished)]. We discuss two converging hints of theta(13) > 0, each at the level of similar to 1 sigma: an older one coming from atmospheric neutrino data, and a newer one coming from the combination of solar and long-baseline reactor neutrino data. Their combination provides the global estimate sin2 theta(13) 0: 016 +/- 0.010(1 sigma), implying a preference for theta(13) > 0 with non-negligible statistical significance (similar to 90% C.L.). We discuss possible refinements of the experimental data analyses, which might sharpen such intriguing indications.