When Two Loops Matter: Electroweak Precision in the SMEFT
Fuente:
arXiv
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| Autori principali: | , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866918475240308736 |
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| author | Born, Lukas Greljo, Admir Thomsen, Anders Eller |
| author_facet | Born, Lukas Greljo, Admir Thomsen, Anders Eller |
| contents | We identify a novel next-to-leading order renormalization effect in the dimension-six SMEFT with direct phenomenological impact. The Higgs-Yukawa operator that modifies the top-Higgs coupling $κ_t$ induces a shift in the $ W $ mass at two-loop order through a large anomalous dimension, rendering electroweak precision observables a powerful indirect probe of $κ_t$. We show that this effect is essential for the consistent interpretation of data from future Tera-$Z$ and Giga-$W$ factories such as FCC-ee. The effect is realized in a simple renormalizable two-Higgs doublet model. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_26817 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | When Two Loops Matter: Electroweak Precision in the SMEFT Born, Lukas Greljo, Admir Thomsen, Anders Eller High Energy Physics - Phenomenology High Energy Physics - Experiment We identify a novel next-to-leading order renormalization effect in the dimension-six SMEFT with direct phenomenological impact. The Higgs-Yukawa operator that modifies the top-Higgs coupling $κ_t$ induces a shift in the $ W $ mass at two-loop order through a large anomalous dimension, rendering electroweak precision observables a powerful indirect probe of $κ_t$. We show that this effect is essential for the consistent interpretation of data from future Tera-$Z$ and Giga-$W$ factories such as FCC-ee. The effect is realized in a simple renormalizable two-Higgs doublet model. |
| title | When Two Loops Matter: Electroweak Precision in the SMEFT |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2604.26817 |