Constraints on Neutrino Parameters by Neutrinoless Double Beta Decay Experiments
Hiroaki Sugiyama
Abstract
Allowed regions on the ml - cos2θ12 plane are extracted from results of neutrinoless double beta decay experiments. It is shown that 0.05 eV (0 eV) < ml < 1.85 eV is obtained for the normal (inverted) hierarchy by using the LMA best fit parameters and the 0νββresult announced late last year, which is 0.05 eV < <m>ββ< 0.84 eV with +/- 50% uncertainty of the nuclear matrix elements.
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