Speaker
Description
We present preliminary results for the Renormalization Group (RG) running of the complete basis of $\Delta F = 2$ four-fermion operators in QCD with $N_\mathrm{f} = 3$ 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. New results are shown for several renormalised couplings, spanning a range of low energy scales $\Lambda_{QCD} \lesssim \mu \lesssim $2GeV. They complement the results presented in ref.[1] for high energy scales 2GeV$\lesssim \mu \lesssim 100$ GeV; for this range results at a new value of the gauge coupling have also been added.
