Determining the strange quark mass for 2-flavour QCD

✍ Scribed by M. Göckeler; R. Horsley; A.C. Irving; D. Pleiter; P.E.L. Rakow; G. Schierholz; H. Stüben; J.M. Zanotti

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 260 KB
• Volume: 153
• Category: Article
• ISSN: 0920-5632
• DOI: 10.1016/j.nuclphysbps.2006.01.023

✦ Synopsis

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-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. * Talk given by R. Horsley.