Non-perturbative improvement of lattice QCD at large momenta
G. Martinelli, G. C. Rossi, C. T. Sachrajda, S. Sharpe, M. Talevi, M. Testa
Abstract
We propose a method to improve lattice operators composed of Wilson fermions which allows the removal of all corrections of O(a), including those proportional to the quark mass. It requires off-shell improvement of quark fields and composite operators, which is achieved by studying the behaviour of quark and gluon correlation functions at large momenta.
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