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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2603.19358 |
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| _version_ | 1866917400962662400 |
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| author | Li, Hao-Lin Ni, Yu-Han Xiao, Ming-Lei Yu, Jiang-Hao Zheng, Xiao-Long |
| author_facet | Li, Hao-Lin Ni, Yu-Han Xiao, Ming-Lei Yu, Jiang-Hao Zheng, Xiao-Long |
| contents | We present a systematic classification of tree-level ultraviolet (UV) completions for dimension-nine SMEFT operators relevant to short-range neutrinoless double beta decay. Using the SMEFT J-basis framework, we categorize distinct UV completions, including both all-boson and boson-fermion-boson topologies. A primary objective is the identification of minimal UV realizations, defined as the smallest set of genuine heavy degrees of freedom required to generate each operator. Out of the 505 unique mediator combinations identified, 440 are found to be minimal, with 12 cases necessitating only two distinct heavy species. While our findings reproduce the scalar- and fermion-mediated results of Ref.[1], we significantly extend the classification by providing the first comprehensive compilation of 324 minimal UV completions featuring vector resonances -- a category previously unexplored in this context. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_19358 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Complete UV Resonances of SMEFT Dim-9 Operators for Short-range Neutrinoless Double Beta Decay Li, Hao-Lin Ni, Yu-Han Xiao, Ming-Lei Yu, Jiang-Hao Zheng, Xiao-Long High Energy Physics - Phenomenology We present a systematic classification of tree-level ultraviolet (UV) completions for dimension-nine SMEFT operators relevant to short-range neutrinoless double beta decay. Using the SMEFT J-basis framework, we categorize distinct UV completions, including both all-boson and boson-fermion-boson topologies. A primary objective is the identification of minimal UV realizations, defined as the smallest set of genuine heavy degrees of freedom required to generate each operator. Out of the 505 unique mediator combinations identified, 440 are found to be minimal, with 12 cases necessitating only two distinct heavy species. While our findings reproduce the scalar- and fermion-mediated results of Ref.[1], we significantly extend the classification by providing the first comprehensive compilation of 324 minimal UV completions featuring vector resonances -- a category previously unexplored in this context. |
| title | Complete UV Resonances of SMEFT Dim-9 Operators for Short-range Neutrinoless Double Beta Decay |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2603.19358 |