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EWPD in the SMEFT to dimension eight

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arxiv 2102.02819 v2 pith:WNSELKFX submitted 2021-02-04 hep-ph

Tyler Corbett , Andreas Helset , Adam Martin , Michael Trott This is my paper · ORCID
classification hep-ph
keywords smeftcorrectionsdimensioneightdatadimension-eighterrorobservables
verification ladder T0 review T1 audit T2 compute T3 formal

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abstract

We calculate the $\mathcal{O}(\langle H^{\dagger} H \rangle^{2} / \Lambda^{4} )$ corrections to LEP electroweak precision data using the geometric formulation of the Standard Model Effective Field Theory (SMEFT). We report our results in simple-to-use interpolation tables that allow the interpretation of this data set to dimension eight for the first time. We demonstrate the impact of these previously unknown terms in the case of a general analysis in the SMEFT, and also in the cases of two distinct models matched to dimension eight. Neglecting such dimension-eight corrections to LEP observables introduces a theoretical error in SMEFT studies. We report some preliminary studies defining such a theory error, explicitly demonstrating the effect of previously unknown dimension-eight SMEFT corrections on LEP observables.

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Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Geometry of soft scalars at one loop

    hep-th 2025-04 conditional novelty 8.0 of 10

    The geometric soft theorem for scalar effective field theories is unchanged at one loop in derivative-coupled theories, and receives a universal leading correction when potential interactions are present.

  2. Renormalizing Two-Fermion Operators in the SMEFT via Supergeometry

    hep-ph 2025-04 conditional novelty 6.0 of 10

    A covariant one-loop divergence formula for mixed boson-fermion graphs is derived and applied to dimension-eight two-fermion RGEs in the SMEFT.

  3. Electroweak Scalar Effects Beyond Dimension-6 in SMEFT

    hep-ph 2025-01 conditional novelty 6.0 of 10

    One-loop dimension-eight SMEFT matching is derived for complex triplet and two-Higgs-doublet scalar extensions, and the dimension-eight terms are shown to matter for GigaZ electroweak precision projections.

  4. A Non-linear Representation of General Scalar Extensions of the Standard Model for HEFT Matching

    hep-ph 2024-11 conditional novelty 6.0 of 10

    The paper constructs a non-linear 'U representation' that separates Goldstone bosons from heavy scalars, enabling straightforward tree-level HEFT matching for general scalar extensions and giving explicit formulas for...

  5. Fingerprinting New Physics with Effective Field Theories

    hep-ph 2025-01 conditional novelty 2.0 of 10

    A thesis compiling published SMEFT global fits, automated UV-model constraints, and ML-based unbinned observables, with projections for HL-LHC, FCC-ee, and CEPC.

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