DEPENDENCE OF THE CURRENT RENORMALISATION CONSTANTS ON THE QUARK MASS
M. Crisafulli, V. Lubicz, G. Martinelli, A. Vladikas
Abstract
We study the behaviour of the vector and axial current renormalisation constants ZV and ZA as a function of the quark mass, mq. We show that sizeable O(amq) and O(g02 a mq) systematic effects are present in the Wilson and Clover cases respectively. We find that the prescription of Kronfeld, Lepage and Mackenzie for correcting these artefacts is not always successful.
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