On the possibility of a measurement of the CP Majorana phase in the   0\nu\beta\beta-decay
  In view of recent measurements of the mixing angle \theta_{13} a possibility to determine the difference of two CP Majorana phases of the neutrino mixing matrix from the study of neutrinoless double-beta decay is investigated. We show that in the case of the inverted hierarchy of neutrino masses it might be possible if neutrinoless double-beta decay will be observed. The required experimental accuracies and uncertainty in the calculated nuclear matrix elements of the process are discussed. 
F. Simkovic, S.M. Bilenky, Amand Faessler, Th. Gutsche
hep-ph