On the QCD sum rule determination of the strange quark mass

1997/04/07 by P. Colangelo, F. De Fazio, G. Nardulli +1 · 9 citations
Physics and Astronomy · #Neutrino Physics Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1016/s0370-2693(97)00751-x

published as Phys.Lett.B408:340-346,1997 · Latex, 13 pages, 3 figures

arxiv created 1997/04/07 · openalex publication_date 1997/09/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

In the QCD Sum Rule determination of m_s using the two-point correlator of divergences of ΔS=1 vector currents, the final uncertainty on m_s is mainly due to the hadronic spectral function. Using a specific parameterization which fully takes into account the available experimental data on the K π (I=1/2, J^P=0⁺) system, characterized by the presence of a relevant nonresonant component in addition to the resonant one, we find m_s(1 GeV)≥ 120 MeV. In particular, varying only the parameters describing the nonresonant K π component and Λ_ MS^n_f=3 we obtain m_s(1 GeV)=125 - 160 MeV. This result is smaller than analogous ones obtained by using a parameterization in terms of only resonant states. We discuss how to systematically improve the determination of m_s by this method.

Citations

• The strange quark mass from QCD sum rules

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