Flavor hierarchies with nonminimal irreducible representations
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arXiv
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| Auteurs principaux: | , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866918510652817408 |
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| author | Banks, Hannah Crawford, Graeme McCullough, Matthew Sutherland, Dave |
| author_facet | Banks, Hannah Crawford, Graeme McCullough, Matthew Sutherland, Dave |
| contents | We propose a new class of flavour models in which the spurion which breaks Standard Model flavour symmetries transforms in a non-minimal representation. Hierarchies in fermion masses, which arise from multiple insertions of this spurion, may be generated in a technically natural, accidental manner, from a handful of untuned $\mathcal{O}(1)$ elements in the UV. This relies explicitly on the non-Abelian nature of the symmetry, distinguishing it from standard Froggatt-Nielsen-like scenarios. The pattern of flavour violating operators at dimension-6 can radically differ from previously considered scenarios, and emphasises the need for a broad flavour programme across all generations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_03403 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Flavor hierarchies with nonminimal irreducible representations Banks, Hannah Crawford, Graeme McCullough, Matthew Sutherland, Dave High Energy Physics - Phenomenology We propose a new class of flavour models in which the spurion which breaks Standard Model flavour symmetries transforms in a non-minimal representation. Hierarchies in fermion masses, which arise from multiple insertions of this spurion, may be generated in a technically natural, accidental manner, from a handful of untuned $\mathcal{O}(1)$ elements in the UV. This relies explicitly on the non-Abelian nature of the symmetry, distinguishing it from standard Froggatt-Nielsen-like scenarios. The pattern of flavour violating operators at dimension-6 can radically differ from previously considered scenarios, and emphasises the need for a broad flavour programme across all generations. |
| title | Flavor hierarchies with nonminimal irreducible representations |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2510.03403 |