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The chirally rotated Schr\"odinger functional for Wilson-fermions allows forfinite-volume, mass-independent renormalization schemes compatible withautomatic O($a$) improvement. So far, in QCD, the set-up has only been studiedin the quenched approximation. Here we present first results for $N_{\rm f} =2$ dynamical quark-flavours for several renormalization factors ofquark-bilinears. We discuss how these renormalization factors can be easilyobtained from simple ratios of two-point functions, and show how automaticO($a$) improvement is at work. As a by-product of this investigation therenormalization of the non-singlet axial current, $Z_A$, is determined veryprecisely.

A dynamical study of the chirally rotated Schr\"odinger functional in QCD