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Determining the strange quark mass for 2-flavour QCD

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arxiv hep-lat/0602028 v1 pith:HXEKW63N submitted 2006-02-22 hep-lat

Determining the strange quark mass for 2-flavour QCD

M. G\"ockeler , R. Horsley , A. C. Irving , D. Pleiter , P. E. L. Rakow , G. Schierholz , H. St\"uben , J. M. Zanotti This is my paper
classification hep-lat
keywords massquarkstrangelatticeresultsactionaxialbeen
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Using the O(a) Symanzik improved action an estimate is given for the strange quark mass for unquenched (n_f=2) QCD. The determination is via the axial Ward identity (AWI) and includes a non-perturbative evaluation of the renormalisation constant. Numerical results have been obtained at several lattice spacings, enabling the continuum limit to be taken. Our results indicate a value for the strange quark mass (in the MS-bar scheme at a scale of 2 GeV) in the range 100 - 130 MeV. A comparison is also made with other recent lattice determinations of the strange quark mass using dynamical sea quarks.

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