Non-perturbative improvement of quark mass renormalization in two-flavour lattice QCD

Understand

We non-perturbatively determine the renormalization constant and the improvement coefficients relating the renormalized current and subtracted quark mass in O(a) improved two-flavour lattice QCD.

• We employ the Schr\"odinger functional scheme and fix the physical extent of the box by working at a constant value of the renormalized coupling.
• Our calculation yields results which cover two regions of bare parameter space.
• One is the weak-coupling region suitable for volumes of about half a fermi.