Cutoff effects in twisted mass lattice QCD

M. Della Morte, R. Frezzotti, J. Heitger, S. Sint

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Abstrakt

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.
OriginalsprogUdefineret/Ukendt
TidsskriftJHEP
ISSN1126-6708
StatusUdgivet - 15. aug. 2001

Bibliografisk note

20 pages, 5 figures. Comments about the uncertainties on improvement coefficients added

Emneord

  • hep-lat

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