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arXiv · hep-lat/0108019

Cutoff effects in twisted mass lattice QCD

M. Della Morte·R. Frezzotti·J. Heitger·S. Sint
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Abstract

We present a first numerical study of lattice QCD with O(a) improved Wilson quarks and a chirally twisted mass term. Renormalized correlation functions are derived from the Schroedinger functional and evaluated in an intermediate space-time volume of size 0.75^3 x 1.5 fm^4. In the quenched approximation precise results are then obtained with a moderate computational effort, allowing for a detailed study of the continuum approach. The latter is discussed in terms of observables which converge to meson masses and decay constants in the limit of large space-time volume. In the O(a) improved theory we find residual cutoff effects to be at the level of a few percent for lattice spacings of about 0.1 fm.

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M. Della Morte, R. Frezzotti, J. Heitger, S. Sint. 2001-11-22. Cutoff effects in twisted mass lattice QCD. https://arxiv.org/abs/hep-lat/0108019

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