Abstract
Matrix elements for 0νββ decay of76Ge,82Se,116Cd,128,130Te,136Xe and150Nd are calculated combining proton-neutron quasiparticle RPA wave functions with the operator expansion method (OEM). The differences between OEM and earlier QRPA calculations, using the closure approximation, are investigated in detail. Special emphasis is put on the discussion on the differences between the 2νββ and the 0νββ mode, since currently 0ν matrix elements can only indirectly be tested. By a comparison with experimental data upper limits on the effective neutrino mass are derived.
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Project supported by the Natural Science Foundation of China
Valuable help from Dr. K. Muto concerning the QRPA part of the calculation is gratefully acknowledged.
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Hirsch, M., Wu, X.R., Klapdor-Kleingrothaus, H.V. et al. Matrix elements for 0νββ decay calculated with the operator expansion method and QRPA wave functions. Z. Physik A - Hadrons and Nuclei 345, 163–169 (1993). https://doi.org/10.1007/BF01293339
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DOI: https://doi.org/10.1007/BF01293339