Impact of the leading-order short-range nuclear matrix element on the neutrinoless double-beta decay of medium-mass and heavy nuclei
We evaluate the leading-order short-range nuclear matrix element for the neutrinoless double-beta () decay of the nuclei most relevant for experiments, including 76Ge, 100Mo, 130Te and 136Xe. In our calculations, performed with the nuclear shell model and proton-neutron quasiparticle random-phase ap...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2021 |
| País: | España |
| Institución: | Universidad de Barcelona |
| Repositorio: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/215187 |
| Acceso en línea: | https://hdl.handle.net/2445/215187 |
| Access Level: | acceso abierto |
| Palabra clave: | Física de partícules Física nuclear Neutrins Particle physics Nuclear physics Neutrinos |
| Sumario: | We evaluate the leading-order short-range nuclear matrix element for the neutrinoless double-beta () decay of the nuclei most relevant for experiments, including 76Ge, 100Mo, 130Te and 136Xe. In our calculations, performed with the nuclear shell model and proton-neutron quasiparticle random-phase approximation (pnQRPA) methods, we estimate the coupling of this term by the contact charge-independence-breaking coupling of various nuclear Hamiltonians. Our results suggest a significant impact of the short-range matrix element, which is about and of the standard -decay long-range matrix element for the shell model and pnQRPA, respectively. Combining the full matrix elements with the results from current -decay experiments we find that, if both matrix elements carry the same sign, these searches move notably toward probing the inverted mass ordering of neutrino masses. |
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