Non-perturbative improvement of stout-smeared three flavour clover fermions

Details Non-perturbative improvement of stout-smeared three flavour clover fermions Non-perturbative improvement of stout-smeared three flavour clover fermions

2009-01-21

arxiv.org/abs/0901.3302v2

Phys.Rev.D79:094507,2009

Physics

High Energy Physics

High Energy Physics - Lattice

30 pages, 13 figures, minor changes, published version

Scientific paper

10.1103/PhysRevD.79.094507

We discuss a 3-flavour lattice QCD action with clover improvement in which the fermion matrix has single level stout smearing for the hopping terms together with unsmeared links for the clover term. With the (tree-level) Symanzik improved gluon action this constitutes the Stout Link Non-perturbative Clover or SLiNC action. To cancel O(a) terms the clover term coefficient has to be tuned. We present here results of a non-perturbative determination of this coefficient using the Schroedinger functional and as a by-product a determination of the critical hopping parameter. Comparisons of the results are made with lowest order perturbation theory.

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