Nuclear matrix elements of neutrinoless double beta decay with improved short-range correlations

Abstract

Nuclear matrix elements of the neutrinoless double beta decays of 96Zr, 100Mo, 116Cd, 128Te, 130Te and 136Xe are calculated for the light-neutrino exchange mechanism by using the proton-neutron quasiparticle random-phase approximation (pnQRPA) with a realistic nucleon-nucleon force. The g_pp parameter of the pnQRPA is fixed by the data on the two-neutrino double beta decays and single beta decays. The finite size of a nucleon, the higher-order terms of nucleonic weak currents, and the nucleon-nucleon short-range correlations (s.r.c) are taken into account. The s.r.c. are computed by the traditional Jastrow method and by the more advanced unitary correlation operator method (UCOM). Comparison of the results obtained by the two methods is carried out. The UCOM computed matrix elements turn out to be considerably larger than the Jastrow computed ones. This result is important for the assessment of the neutrino-mass sensitivity of the present and future double beta experiments.

Two figures, to be published in Physical Review C (2007) as a regular article

References in corpus (3)

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• Improved short-range correlations and 0nbb nuclear matrix elements of 76Ge and 82Se
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Cited by in corpus (7)

• Anatomy of nuclear matrix elements for neutrinoless double-beta decay
• The influence of pairing on the nuclear matrix elements of the neutrinoless double beta decays
• Results from a search for the $0\nu \beta \beta$-decay of ${}^{130}Te$
• Q value of the 100Mo Double-Beta Decay
• Search for ${\beta }^{+}$EC and ECEC processes in ${}^{112}$Sn and ${\beta }^{-}{\beta }^{-}$ decay of ${}^{124}$Sn to the excited states of ${}^{124}$Te
• Description of double beta decay within continuum-QRPA
• Search for Neutrinoless Double Beta Decay with NEMO 3 and SuperNEMO