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arXiv · 2601.19974

Next-to-Leading Order Running in the SMEFT

Lukas Born·Javier Fuentes-Martín·Anders Eller Thomsen
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Abstract

The next-to-leading order (NLO) Standard Model Effective Field Theory (SMEFT) renormalization group equations are needed to account for phenomenologically relevant operator mixing and ensure renormalization scale independence in NLO calculations of observables. For the first time, we present the renormalization group equations of the baryon-number-conserving sector of the dimension-six SMEFT up to two-loop order. Our calculations have been performed using functional methods with an anticommuting $ \gamma_5 $-scheme. A variety of strategies are employed to mitigate the reading-point ambiguities inherent to this scheme choice. We also describe how a local version of the $ \boldsymbol{R}^\ast $-method is adapted to handle the evanescent operators arising in dimensional regularization. The results are provided in various supplementary files to make them accessible for both human inspection and numerical implementation.

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Lukas Born, Javier Fuentes-Martín, Anders Eller Thomsen. 2026-01-27. Next-to-Leading Order Running in the SMEFT. https://arxiv.org/abs/2601.19974

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