On the QCD Sum Rule Determination of the Strange Quark Mass

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dc.creatorColangelo, P.
dc.creatorDe Fazio, F.
dc.creatorNardulli, G.
dc.creatorPaver, N.
dc.date1997-04-07
dc.date.accessioned2026-07-07T10:33:30Z
dc.date.available2026-07-07T10:33:30Z
dc.descriptionIn 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 ${\bar m_s}(1 GeV)\ge 120 MeV$. In particular, varying only the parameters describing the nonresonant $K π$ component and $Λ_{\bar {MS}}^{n_f=3}$ we obtain ${\bar m_s}(1 GeV)=125 - 160 MeV$. 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.
dc.descriptionLatex, 13 pages, 3 figures
dc.identifierhttps://arxiv.org/abs/hep-ph/9704249
dc.identifierhttp://arxiv.org/abs/hep-ph/9704249
dc.identifierPhys.Lett.B408:340-346,1997
dc.identifierdoi:10.1016/S0370-2693(97)00751-X
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/179132
dc.subjectHigh Energy Physics - Phenomenology
dc.titleOn the QCD Sum Rule Determination of the Strange Quark Mass
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