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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2509.13193 |
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| _version_ | 1866915497466920960 |
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| author | Rosell, Ignasi Pich, Antonio Sanz-Cillero, Juan Jose |
| author_facet | Rosell, Ignasi Pich, Antonio Sanz-Cillero, Juan Jose |
| contents | Within the framework of a general non-linear effective field theory describing the electroweak symmetry breaking, we perform a detailed analysis of the next-to-leading contributions to the electroweak oblique parameters $S$ and $T$ from hypothetical heavy resonance states strongly coupled to Standard Model fields. This work extends our previous results by including parity-odd operators in the effective Lagrangian, contributions from fermionic cuts, and up-to-date experimental constraints. We demonstrate that in strongly-coupled ultraviolet completions satisfying both Weinberg Sum Rules -- as is the case in asymptotically free gauge theories -- the vector and axial-vector resonance masses are constrained to lie above $10\,$TeV. Conversely, scenarios allowing for lighter resonances with masses between $2\,$and $10\,$TeV necessarily imply a violation of the second Weinberg Sum Rule. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_13193 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Searching for heavy resonances via oblique parameters in non-linear effective frameworks Rosell, Ignasi Pich, Antonio Sanz-Cillero, Juan Jose High Energy Physics - Phenomenology Within the framework of a general non-linear effective field theory describing the electroweak symmetry breaking, we perform a detailed analysis of the next-to-leading contributions to the electroweak oblique parameters $S$ and $T$ from hypothetical heavy resonance states strongly coupled to Standard Model fields. This work extends our previous results by including parity-odd operators in the effective Lagrangian, contributions from fermionic cuts, and up-to-date experimental constraints. We demonstrate that in strongly-coupled ultraviolet completions satisfying both Weinberg Sum Rules -- as is the case in asymptotically free gauge theories -- the vector and axial-vector resonance masses are constrained to lie above $10\,$TeV. Conversely, scenarios allowing for lighter resonances with masses between $2\,$and $10\,$TeV necessarily imply a violation of the second Weinberg Sum Rule. |
| title | Searching for heavy resonances via oblique parameters in non-linear effective frameworks |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2509.13193 |