A novel method to treat effects from evanescent operators in next-to-leading order (NLO) computations is introduced. The approach allows, besides further simplifications, to discard evanescent-to-physical mixing contributions in NLO calculations. The method is independent of the treatments of γ ₅ γ 5 and can therefore be combined with different renormalization schemes. We illustrate the utility of this result by reproducing literature results of two-loop anomalous dimension matrices for both |Δ F| = 1 | Δ F | = 1 and |Δ F| = 2 | Δ F | = 2 transitions.
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Aebischer et al. (2024) studied this question.
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