6533b7defe1ef96bd1275faa
RESEARCH PRODUCT
Determination of the strange-quark mass from QCD pseudoscalar sum rules
Cesareo A. DominguezKarl SchilcherL. Pirovanosubject
PhysicsQuantum chromodynamicsNuclear and High Energy PhysicsStrange quarkParticle physicsLaplace transformHigh Energy Physics::LatticeHadronHigh Energy Physics::PhenomenologyPerturbative QCDFOS: Physical sciencesFunction (mathematics)Atomic and Molecular Physics and OpticsPseudoscalarHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)High Energy Physics::ExperimentSum rule in quantum mechanicsNuclear Experimentdescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1998-09-11 |