Limits of Majorana neutrino mass from combined analysis of data from Ge-76 and Xe-136 neutrinoless double beta decay experiments

摘要

We present effective Majorana neutrino mass limits < m (beta beta)> obtained from the joint analysis of the recently published results of Ge-76 and Xe-136 neutrinoless double beta decay (0 nu beta beta) experiments, which was carried out by using the Bayesian calculations. Nuclear matrix elements (NMEs) used for the analysis are taken from the works, in which NMEs of Ge-76 and Xe-136 were simultaneously calculated. This reduced systematic errors connected with NME calculation techniques. The new effective Majorana neutrino mass limits < m (beta beta)> less than [85.4-197.0] meV are much closer to the inverse neutrino mass hierarchy region.