Impact of nuclear matrix element calculations for current and future neutrinoless double beta decay searches
Abstract Nuclear matrix elements (NME) are a crucial input for the interpretation of neutrinoless double beta decay data. We consider a representative set of recent NME calculations from different methods and investigate the impact on the present bound on the effective Majorana mass m ββ by performi...
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Format: | Article |
Language: | English |
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SpringerOpen
2023-06-01
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Series: | Journal of High Energy Physics |
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Online Access: | https://doi.org/10.1007/JHEP06(2023)104 |
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author | Federica Pompa Thomas Schwetz Jing-Yu Zhu |
author_facet | Federica Pompa Thomas Schwetz Jing-Yu Zhu |
author_sort | Federica Pompa |
collection | DOAJ |
description | Abstract Nuclear matrix elements (NME) are a crucial input for the interpretation of neutrinoless double beta decay data. We consider a representative set of recent NME calculations from different methods and investigate the impact on the present bound on the effective Majorana mass m ββ by performing a combined analysis of the available data as well as on the sensitivity reach of future projects. A crucial role is played by the recently discovered short-range contribution to the NME, induced by light Majorana neutrino masses. Depending on the NME model and the relative sign of the long- and short-range contributions, the current 3σ bound can change between m ββ < 40 meV and 600 meV. The sign-uncertainty may either boost the sensitivity of next-generation experiments beyond the region for m ββ predicted for inverted mass ordering or prevent even advanced setups to reach this region. Furthermore, we study the possibility to distinguish between different NME calculations by assuming a positive signal and by combining measurements from different isotopes. Such a discrimination will be impossible if the relative sign of the long- and short-range contribution remains unknown, but can become feasible if m ββ ≳ 40 meV and if the relative sign is known to be positive. Sensitivities will be dominated by the advanced 76Ge and 136Xe setups assumed here, but NME model-discrimination improves if data from a third isotope is added, e.g., from 130Te or 100Mo. |
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format | Article |
id | doaj.art-2ee7f60606bb44cea7689278674e0d0b |
institution | Directory Open Access Journal |
issn | 1029-8479 |
language | English |
last_indexed | 2024-03-11T22:19:42Z |
publishDate | 2023-06-01 |
publisher | SpringerOpen |
record_format | Article |
series | Journal of High Energy Physics |
spelling | doaj.art-2ee7f60606bb44cea7689278674e0d0b2023-09-24T11:07:23ZengSpringerOpenJournal of High Energy Physics1029-84792023-06-012023612910.1007/JHEP06(2023)104Impact of nuclear matrix element calculations for current and future neutrinoless double beta decay searchesFederica Pompa0Thomas Schwetz1Jing-Yu Zhu2Instituto de Física Corpuscular (IFIC), University of Valencia-CSICInstitut für Astroteilchen Physik, Karlsruher Institut für Technologie (KIT)Institut für Astroteilchen Physik, Karlsruher Institut für Technologie (KIT)Abstract Nuclear matrix elements (NME) are a crucial input for the interpretation of neutrinoless double beta decay data. We consider a representative set of recent NME calculations from different methods and investigate the impact on the present bound on the effective Majorana mass m ββ by performing a combined analysis of the available data as well as on the sensitivity reach of future projects. A crucial role is played by the recently discovered short-range contribution to the NME, induced by light Majorana neutrino masses. Depending on the NME model and the relative sign of the long- and short-range contributions, the current 3σ bound can change between m ββ < 40 meV and 600 meV. The sign-uncertainty may either boost the sensitivity of next-generation experiments beyond the region for m ββ predicted for inverted mass ordering or prevent even advanced setups to reach this region. Furthermore, we study the possibility to distinguish between different NME calculations by assuming a positive signal and by combining measurements from different isotopes. Such a discrimination will be impossible if the relative sign of the long- and short-range contribution remains unknown, but can become feasible if m ββ ≳ 40 meV and if the relative sign is known to be positive. Sensitivities will be dominated by the advanced 76Ge and 136Xe setups assumed here, but NME model-discrimination improves if data from a third isotope is added, e.g., from 130Te or 100Mo.https://doi.org/10.1007/JHEP06(2023)104Baryon/Lepton Number ViolationNeutrino Interactions |
spellingShingle | Federica Pompa Thomas Schwetz Jing-Yu Zhu Impact of nuclear matrix element calculations for current and future neutrinoless double beta decay searches Journal of High Energy Physics Baryon/Lepton Number Violation Neutrino Interactions |
title | Impact of nuclear matrix element calculations for current and future neutrinoless double beta decay searches |
title_full | Impact of nuclear matrix element calculations for current and future neutrinoless double beta decay searches |
title_fullStr | Impact of nuclear matrix element calculations for current and future neutrinoless double beta decay searches |
title_full_unstemmed | Impact of nuclear matrix element calculations for current and future neutrinoless double beta decay searches |
title_short | Impact of nuclear matrix element calculations for current and future neutrinoless double beta decay searches |
title_sort | impact of nuclear matrix element calculations for current and future neutrinoless double beta decay searches |
topic | Baryon/Lepton Number Violation Neutrino Interactions |
url | https://doi.org/10.1007/JHEP06(2023)104 |
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