تقرير
Two-neutrino double-beta decay matrix elements based on relativistic nuclear energy density functional
| العنوان: | Two-neutrino double-beta decay matrix elements based on relativistic nuclear energy density functional |
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| المؤلفون: | Popara, N., Ravlić, A., Paar, N. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Nuclear Theory, Nuclear Experiment |
| الوصف: | Nuclear matrix elements (NMEs) for two-neutrino double-beta decay ($2\nu\beta\beta$) are studied in the framework of relativistic nuclear energy density functional (REDF). The properties of nuclei involved in the decay are obtained using the relativistic Hartree-Bardeen-Cooper-Schrieffer theory and relevant nuclear transitions are described using the relativistic proton-neutron quasiparticle random phase approximation based on relativistic energy density functional (REDF-QRPA). Three effective interactions have been employed, including density-dependent meson-exchange (DD-ME2) and point coupling interactions (DD-PC1 and DD-PCX), and pairing correlations are described consistently both in $T=1$ and $T=0$ channels using a separable pairing interaction. The optimal values of $T=0$ pairing strength parameter $V_{0pp}$ are constrained by the experimental data on $\beta$-decay half lives. The $2\nu\beta\beta$ matrix elements and half-lives are calculated for several nuclides experimentally known to undergo this kind of decay: $^{48}$Ca, $^{76}$Ge, $^{82}$Se, $^{96}$Zr, $^{100}$Mo, $^{116}$Cd, $^{124}$Xe, $^{128}$Te, $^{130}$Te, $^{136}$Xe and $^{150}$Nd. The model dependence of the NMEs and their sensitivity on $V_{0pp}$ is investigated, and the NMEs obtained using optimal values of $V_{0pp}$ are discussed in comparison to previous studies. The results of the present work represent an important benchmark for the future applications of the relativistic framework in studies of neutrinoless double-beta decay. Comment: 18 pages, 12 figures, accepted for publication in Physical Review C |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevC.105.064315 |
| URL الوصول: | http://arxiv.org/abs/2107.08747 |
| رقم الأكسشن: | edsarx.2107.08747 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevC.105.064315 |
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