Evidence of theta(13)>0 from global neutrino data analysis
Abstract
The neutrino mixing angle theta(13) is at the focus of current neutrino research. From a global analysis of the available oscillation data in a 3-neutrino framework, we previously reported [Phys. Rev. Lett. 101, 141801 (2008)] hints in favor of theta(13)>0 at the 90 % C.L. Such hints are consistent with the recent indications of nu(mu)-->nu(e) appearance in the T2K and MINOS long-baseline accelerator experiments. Our global analysis of all the available data currently provides >3 sigma evidence for nonzero theta(13), with 1-sigma ranges sin^2 theta(13) = 0.021+-0.007 or 0.025+-0.007, depending on reactor neutrino flux systematics. Updated ranges are also reported for the other 3-neutrino oscillation parameters (delta m^2, sin^2 theta(12)) and (Delta m^2, sin^2 theta(23)).
Cite
@article{arxiv.1106.6028,
title = {Evidence of theta(13)>0 from global neutrino data analysis},
author = {G. L. Fogli and E. Lisi and A. Marrone and A. Palazzo and A. M. Rotunno},
journal= {arXiv preprint arXiv:1106.6028},
year = {2013}
}
Comments
Slightly revised text; results unchanged. To appear in Phys. Rev. D