Agostini, M;
Deppisch, FF;
Van Goffrier, G;
(2023)
Probing the mechanism of neutrinoless double-beta decay in multiple isotopes.
Journal of High Energy Physics
, 2023
(2)
, Article 172. 10.1007/JHEP02(2023)172.
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Abstract
A large experimental program is being mounted to search for neutrinoless double-beta decay over the next decade. Multiple experiments using different target isotopes are being prepared to explore the whole parameter space allowed for inverted-ordered light neutrinos, and have the potential to make discoveries in several other scenarios, including normal-ordered light neutrinos and other exotic mechanisms. We investigate to what extent long-range and exotic short-range contributions may be distinguished by combining measurements of the decay half-life across isotopes in the framework of a global Bayesian analysis. We demonstrate how measurements in two isotopes will constrain the parameter space up to a two-fold degeneracy, and how a further measurement in a third isotope removes such a degeneracy. We also discuss the impact of uncertainties and correlations in nuclear matrix element calculations. Our work motivates an experimental program measuring neutrinoless double-beta decay in more than one isotope, as this would break parameter degeneracies and advance our understanding of particle physics beyond the Standard Model.
| Type: | Article |
|---|---|
| Title: | Probing the mechanism of neutrinoless double-beta decay in multiple isotopes |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1007/JHEP02(2023)172 |
| Publisher version: | https://doi.org/10.1007/JHEP02(2023)172 |
| Language: | English |
| Additional information: | © 2023 Springer Nature Switzerland AG. This article is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/). |
| Keywords: | Baryon/Lepton Number Violation, Specific BSM Phenomenology, Neutrino Interactions |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10165718 |
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