We present preliminary results for the Renormalization Group (RG) running of the complete basis of Δ𝐹 = 2 four-fermion operators in QCD with 𝑁_𝑓 = 3 dynamical massless flavors. We use $O(a)$-improved Wilson fermions in a mixed action setup, with chirally rotated Schrödinger functional (𝜒SF) boundary conditions for the valence quarks and Schrödinger functional (SF) boundary conditions for the sea quarks. The RG evolution operators are evaluated non-perturbatively via the matrix step-scaling functions (matrix SSF) while the perturbative running is computed using a new approach relying on the Poincaré-Dulac theorem.
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Marinelli et al. (2024) studied this question.
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