Isospin-breaking vector mason decay constants from continuous families of finite energy sum rules - art. no. 096003.

The isospin-breaking vector meson decay constants are determined from a QCD sum rule analysis of the vector current correlator [O\T((VmuVnu8)-V-3)\O], using a recently proposed implementation of the finite energy sum rule app roach. The analysis employs the three loop version of the OPE and two diffe rent families of weight functions. It is shown that the requirement of cons istency between results obtained using these two different weight families leads to a rather good determination of the parameter describing the deviat ion of the D = 6 condensate term in the OPE from its vacuum saturation valu e, and that the ability to determine this value has non-trivial numerical c onsequences on the analysis. The phenomenological relevance of the results to experimental extractions of the isoscalar and isovector spectral functio ns in e(+)e(-) --> hadrons, the extraction of the strange quark mass and th e determination of the 6(th) order chiral low energy constant, Q, is also b riefly discussed. [S0556-2821(99)06009-9].