paper

A Redetermination of the Neutrino Mass-Squared Difference in Tri-Maximal Mixing with Terrestrial Matter Effects

arXiv:hep-ph/9904297 · doi:10.1016/S0370-2693(99)00438-4

Abstract

We re-fit for the neutrino mass-squared difference in the threefold maximal (ie. tri-maximal) mixing scenario using recent CHOOZ and SUPER-K data, taking account of matter effects in the Earth. While matter effects have little influence on reactor experiments and proposed long-baseline accelerator experiments with $L \simlt 1000 km$, they are highly significant for atmospheric experiments, suppressing naturally mixing and enhancing mixing, so as to effectively remove the experimental distinction between threefold maximal and twofold maximal mixing. Threefold maximal mixing is fully consistent with the CHOOZ and SUPER-K data and the best-fit value for the neutrino mass-squared difference is .

17 Pages LaTex, plus 8 Figures as postscript files

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