Constraints on neutrino mixing parameters by neutrinoless double beta decay experiments Original Research Article

Constraints on neutrino mixing parameters are extracted from results of neutrinoless double beta decay experiments and displayed as allowed regions on the ml-cos2Θ12 plane. For example, 0.05 eV(0eV) ≲ ml ≲ 1.85 eV is obtained for the normal (inverted) hierarchy by using the LMA best fit parameters and the 0νββ ersult announced late 2001.