Abstract
The method of approximate analytic continuation by duality (ACD), which permits to extrapolate a two-point function from its asymptotic QCD form down to Q 2 = 0, is used to determine the value of the light quark masses in QCD. For the value of the four-quark condensate advocated by Shifman, Vainshtein and Zakharov we obtain ( m u + m d) = (21 ± 2) MeV at Q 2 = 1 GeV 2.
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