Symmetry Restoration in the SMEFT: Finite Counterterms for a Non-Anticommuting $γ_5$
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| Format: | Preprint |
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2025
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| _version_ | 1866911474954272768 |
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| author | Fuentes-Martín, Javier Moreno-Sánchez, Adrián Thomsen, Anders Eller |
| author_facet | Fuentes-Martín, Javier Moreno-Sánchez, Adrián Thomsen, Anders Eller |
| contents | We present a systematic functional approach to calculating symmetry-restoring counterterms in Effective Field Theories (EFTs) regulated using the Breitenlohner--Maison--'t Hooft--Veltman (BMHV) scheme. Building on a recently developed method that employs auxiliary spurion fields, our approach automates the extraction of these counterterms directly from the one-loop effective action, offering a streamlined and efficient procedure. We demonstrate its efficacy by applying it to the Standard Model Effective Field Theory (SMEFT) at dimension six, providing the first complete determination of its symmetry-restoring counterterms in the BMHV scheme. Our work establishes a robust foundation for consistent one-loop matching and two-loop running computations in EFTs with chiral gauge symmetries. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2507_19589 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Symmetry Restoration in the SMEFT: Finite Counterterms for a Non-Anticommuting $γ_5$ Fuentes-Martín, Javier Moreno-Sánchez, Adrián Thomsen, Anders Eller High Energy Physics - Phenomenology We present a systematic functional approach to calculating symmetry-restoring counterterms in Effective Field Theories (EFTs) regulated using the Breitenlohner--Maison--'t Hooft--Veltman (BMHV) scheme. Building on a recently developed method that employs auxiliary spurion fields, our approach automates the extraction of these counterterms directly from the one-loop effective action, offering a streamlined and efficient procedure. We demonstrate its efficacy by applying it to the Standard Model Effective Field Theory (SMEFT) at dimension six, providing the first complete determination of its symmetry-restoring counterterms in the BMHV scheme. Our work establishes a robust foundation for consistent one-loop matching and two-loop running computations in EFTs with chiral gauge symmetries. |
| title | Symmetry Restoration in the SMEFT: Finite Counterterms for a Non-Anticommuting $γ_5$ |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2507.19589 |