Systematical decomposition of dimension-11 short-range neutrinoless double beta decay operators
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| Format: | Preprint |
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2026
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| _version_ | 1866914301568090112 |
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| author | Li, Shi-Yu Ding, Gui-Jun |
| author_facet | Li, Shi-Yu Ding, Gui-Jun |
| contents | Neutrinoless double beta decay ($0νββ$) may receive sizable contributions from short-range physics beyond the Standard Model. We present a systematical classification of all tree-level ultraviolet completions of the dimension-11 short-range $0νββ$ decay operators, renormalizable scenarios with scalar and fermion mediators are considered. We identify eight distinct topologies and twenty-eight viable diagrams, from which all consistent UV completions are generated by imposing Standard Model gauge invariance. All these models involve a total of 61 new fields beyond the Standard Model and they typically feature fractionally charged fermions and exotic bosons such as dileptons, diquarks, and leptoquarks. We further study a representative model without colored mediators and analyze its implications for the $0νββ$ decay half-life and light neutrino masses. We find that current and future $0νββ$ decay experiments impose stringent constraints. Our systematic decomposition provides a general framework for exploring exotic short-range contributions to $0νββ$ decay in future experiments. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2602_02152 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Systematical decomposition of dimension-11 short-range neutrinoless double beta decay operators Li, Shi-Yu Ding, Gui-Jun High Energy Physics - Phenomenology High Energy Physics - Experiment Nuclear Theory Neutrinoless double beta decay ($0νββ$) may receive sizable contributions from short-range physics beyond the Standard Model. We present a systematical classification of all tree-level ultraviolet completions of the dimension-11 short-range $0νββ$ decay operators, renormalizable scenarios with scalar and fermion mediators are considered. We identify eight distinct topologies and twenty-eight viable diagrams, from which all consistent UV completions are generated by imposing Standard Model gauge invariance. All these models involve a total of 61 new fields beyond the Standard Model and they typically feature fractionally charged fermions and exotic bosons such as dileptons, diquarks, and leptoquarks. We further study a representative model without colored mediators and analyze its implications for the $0νββ$ decay half-life and light neutrino masses. We find that current and future $0νββ$ decay experiments impose stringent constraints. Our systematic decomposition provides a general framework for exploring exotic short-range contributions to $0νββ$ decay in future experiments. |
| title | Systematical decomposition of dimension-11 short-range neutrinoless double beta decay operators |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment Nuclear Theory |
| url | https://arxiv.org/abs/2602.02152 |