Probing the mechanism of neutrinoless double-beta decay in multiple isotopes
Probing the mechanism of neutrinoless double-beta decay in multiple isotopes
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.
Baryon/Lepton Number Violation, Neutrino Interactions, Specific BSM Phenomenology
Agostini, Matteo
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Deppisch, Frank F.
c4934bce-d5e7-416d-a0a2-3ea60ca42b4b
Van Goffrier, Graham
18877be8-d9be-4c90-a625-8f1c11b9cb84
16 February 2023
Agostini, Matteo
0395d468-0d50-4190-9c1e-7711b86086ed
Deppisch, Frank F.
c4934bce-d5e7-416d-a0a2-3ea60ca42b4b
Van Goffrier, Graham
18877be8-d9be-4c90-a625-8f1c11b9cb84
Agostini, Matteo, Deppisch, Frank F. and Van Goffrier, Graham
(2023)
Probing the mechanism of neutrinoless double-beta decay in multiple isotopes.
Journal of High Energy Physics, 2023 (2), [172].
(doi:10.1007/JHEP02(2023)172).
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.
Text
JHEP02(2023)172
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Accepted/In Press date: 24 January 2023
Published date: 16 February 2023
Keywords:
Baryon/Lepton Number Violation, Neutrino Interactions, Specific BSM Phenomenology
Identifiers
Local EPrints ID: 482033
URI: http://eprints.soton.ac.uk/id/eprint/482033
ISSN: 1126-6708
PURE UUID: d25b52e5-bb76-4cc0-9623-99e801c5bc00
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Date deposited: 18 Sep 2023 16:30
Last modified: 18 Mar 2024 04:16
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Contributors
Author:
Matteo Agostini
Author:
Frank F. Deppisch
Author:
Graham Van Goffrier
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