Abstract
We discuss the problem of lattice artefacts in QCD simulations enhanced by the introduction of dynamical charmed quarks. In particular, we advocate the use of a massive renormalization scheme with a close to realistic charm mass. To maintain O(a) improvement for Wilson type fermions in this case we define a finite size scheme and carry out a nonperturbative estimation of the clover coefficient csw. It is summarized in a fit formula csw(g 20 ) that defines an improved action suitable for future dynamical charm simulations.
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26 October 2020
We correct for typos and add a few missing details that can help to reproduce our calculations. The results of our original paper remain unchanged.
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Fritzsch, P., Sommer, R., Stollenwerk, F. et al. Symanzik improvement with dynamical charm: a 3+1 scheme for Wilson quarks. J. High Energ. Phys. 2018, 25 (2018). https://doi.org/10.1007/JHEP06(2018)025
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DOI: https://doi.org/10.1007/JHEP06(2018)025