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

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

1998-09-11

arxiv.org/abs/hep-ph/9809338v1

Nucl.Phys.Proc.Suppl. 74 (1999) 313-316

Physics

High Energy Physics

High Energy Physics - Phenomenology

Invited talk given by CAD at QCD98, Montpellier, July 1998. To appear in Nucl.Phys.B Proc.Suppl. Latex File. Four (double colu

Scientific paper

10.1016/S0920-5632(99)00185-1

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(alpha_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 function is: m_s(1 GeV^2) = 155 pm 25 MeV.

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