Description of the ov beta beta decay of 48Ca, 76Ge, 100Mo, 128,130Te

Abstract

The neutrinoless double- beta decay of the experimentally interesting A=48, 76, 100, 128 and 130 systems is examined in the context of the QRPA formalism without invoking the closure approximation. All possible nuclear matrix elements are calculated including the nucleon recoil contributions as well as those resulting from the exchange of heavy intermediate Majorana neutrinos. Using the best available experimental limit T12/exp(0 nu )>1.1*1024y the following limits on the lepton violating parameters are extracted: mod (mnu ) mod <2.0 eV, (1/MN)R-1>or=6.7*104 GeV, lambda <or=3.3*106 and eta <or=4.2*10-8.