Probing the mechanism of neutrinoless double-beta decay in multiple isotopes

被引：10

作者：

Agostini, Matteo ^{[1
]}

Deppisch, Frank F. ^{[1
]}

Van Goffrier, Graham ^{[1
]}

机构：

[1] UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2023年 / 2023卷 / 02期

基金：

英国科研创新办公室;

关键词：

Baryon/Lepton Number Violation; Specific BSM Phenomenology; Neutrino Interactions;

D O I：

10.1007/JHEP02(2023)172

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

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.

引用

页数：30

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