Estimating the unquenched strange quark mass from the lattice axial Ward identity

Journal Article · Wed Mar 01 00:00:00 EST 2006 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.73.054508· OSTI ID:20776884

Goeckeler, M ^[1]; Horsley, R; Zanotti, J M ^[2]; Irving, A C; Rakow, P E.L. ^[3]; Pleiter, D ^[4]; Schierholz, G ^[4]; Deutsches Elektronen-Synchrotron DESY, D-22603 Hamburg ^[5]; Stueben, H ^[6]

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1. Institut fuer Theoretische Physik, Universitaet Regensburg, D-93040 Regensburg (Germany)
2. School of Physics, University of Edinburgh, Edinburgh EH9 3JZ (United Kingdom)
3. Department of Mathematical Sciences, University of Liverpool, Liverpool L69 3BX (United Kingdom)
4. John von Neumann-Institut fuer Computing NIC, Deutsches Elektronen-Synchrotron DESY, D-15738 Zeuthen (Germany)
5. Germany
6. Konrad-Zuse-Zentrum fuer Informationstechnik Berlin, D-14195 Berlin (Germany)

We present a determination of the strange quark mass for two flavors (n{sub f}=2) of light dynamical quarks using the axial Ward identity. The calculations are performed on the lattice using O(a) improved Wilson fermions and include a fully nonperturbative determination of the renormalization constant. In the continuum limit we find m{sub s}{sup MS}(2 GeV)=111(6)(4)(6) MeV, using the force scale r{sub 0}=0.467 fm, where the first error is statistical, the second and third are systematic due to the fit and scale uncertainties, respectively. Results are also presented for the light quark mass and the chiral condensate. The corresponding results are also given for r{sub 0}=0.5 fm.

• OSTI ID: 20776884
• Journal Information: Physical Review. D, Particles Fields, Vol. 73, Issue 5; Other Information: DOI: 10.1103/PhysRevD.73.054508; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CHIRAL SYMMETRY
CHIRALITY
D QUARKS
ERRORS
FLAVOR MODEL
GEV RANGE
LATTICE FIELD THEORY
MEV RANGE
RENORMALIZATION
REST MASS
S QUARKS
U QUARKS
WARD IDENTITY