Nonperturbative improvement of stout-smeared three-flavor clover fermions

Journal Article · Fri May 01 00:00:00 EDT 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.79.094507· OSTI ID:21308441

Cundy, N; Goeckeler, M; Kaltenbrunner, T; Schaefer, A ^[1]; Horsley, R; Kennedy, A D; Zanotti, J M ^[2]; Nakamura, Y ^[1]; Deutsches Elektronen-Synchrotron DESY, 15738 Zeuthen ^[3]; Perlt, H; Schiller, A ^[4]; Pleiter, D ^[5]; Rakow, P E. L. ^[6]; Schierholz, G ^[1]; Deutsches Elektronen-Synchrotron DESY, 22603 Hamburg ^[3]; Stueben, H ^[7]

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1. Institut fuer Theoretische Physik, Universitaet Regensburg, 93040 Regensburg (Germany)
2. School of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3JZ (United Kingdom)
3. Germany
4. Institut fuer Theoretische Physik, Universitaet Leipzig, 04109 Leipzig (Germany)
5. Deutsches Elektronen-Synchrotron DESY, 15738 Zeuthen (Germany)
6. Theoretical Physics Division, Department of Mathematical Sciences, University of Liverpool, Liverpool L69 3BX (United Kingdom)
7. Konrad-Zuse-Zentrum fuer Informationstechnik Berlin, 14195 Berlin (Germany)

We discuss a three-flavor 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 nonperturbative clover or SLiNC action. To cancel O(a) terms the clover term coefficient has to be tuned. We present here results of a nonperturbative 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.

• OSTI ID: 21308441
• Journal Information: Physical Review. D, Particles Fields, Vol. 79, Issue 9; Other Information: DOI: 10.1103/PhysRevD.79.094507; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

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QUANTUM CHROMODYNAMICS