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Determination of the strange-quark mass from QCD pseudoscalar sum rules

Authors
Journal
Nuclear Physics B - Proceedings Supplements
0920-5632
Publisher
Elsevier
Publication Date
Volume
74
Identifiers
DOI: 10.1016/s0920-5632(99)00185-1
Keywords
  • Part 6. Quark And Lepton Masses
Disciplines
  • Physics

Abstract

Abstract A new determination of the strange-quark mass is discussed, based on the two-point function involving the axial-vector current divergences. This Green function is known in perturbative QCD up to order O ( α s 3), and up to dimension-six in the non-perturbative domain. The hadronic spectral function is parametrized in terms of the kaon pole, followed by its two radial excitations, and normalized at threshold according to conventional chiral-symmetry. The result of a Laplace transform QCD sum rule analysis of this two-point functions is: m s(1GeV 2) = 155±25 MeV

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