Cutoff effects in twisted mass lattice QCD | Zendy

ALPHA Collaboration | Zendy; Michele Della Morte | Zendy; R. Frezzotti | Zendy; Jochen Heitger | Zendy; Stefan Sint | Zendy

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Cutoff effects in twisted mass lattice QCD

Author(s) -

ALPHA Collaboration,

Michele Della Morte,

R. Frezzotti,

Jochen Heitger,

Stefan Sint

Publication year - 2001

Publication title -

journal of high energy physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.998

H-Index - 261

eISSN - 1126-6708

pISSN - 1029-8479

DOI - 10.1088/1126-6708/2001/10/041

Subject(s) - physics , cutoff , lattice qcd , observable , quantum chromodynamics , quark , lattice (music) , quenched approximation , lattice field theory , lattice constant , particle physics , exponential decay , lattice gauge theory , mathematical physics , quantum electrodynamics , quantum mechanics , gauge theory , diffraction , acoustics

We present a first numerical study of lattice QCD with O(a) improved Wilsonquarks and a chirally twisted mass term. Renormalized correlation functions arederived from the Schroedinger functional and evaluated in an intermediatespace-time volume of size 0.75^3 x 1.5 fm^4. In the quenched approximationprecise results are then obtained with a moderate computational effort,allowing for a detailed study of the continuum approach. The latter isdiscussed in terms of observables which converge to meson masses and decayconstants in the limit of large space-time volume. In the O(a) improved theorywe find residual cutoff effects to be at the level of a few percent for latticespacings of about 0.1 fm.

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