Isospin-breaking vector meson decay constants from continuous families of finite energy sum rules
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(Published version)
Date
1999
Authors
Maltman, Kim
Wolfe, Carl E.
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Journal article
Citation
Physical Review D, 1999; 59(9):096003
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Kim Maltman and C. E. Wolfe
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Abstract
The isospin-breaking vector meson decay constants are determined from a QCD sum rule analysis of the vector current correlator 〈O|T(Vμ³Vν⁸)|O〉, using a recently proposed implementation of the finite energy sum rule approach. The analysis employs the three-loop version of the OPE and two different families of weight functions. It is shown that the requirement of consistency between results obtained using these two different weight families leads to a rather good determination of the parameter describing the deviation of the D=6 condensate term in the OPE from its vacuum saturation value, and that the ability to determine this value has non-trivial numerical consequences on the analysis. The phenomenological relevance of the results to experimental extractions of the isoscalar and isovector spectral functions in e+e-→hadrons, the extraction of the strange quark mass and the determination of the 6th order chiral low energy constant, Q, is also briefly discussed.
School/Discipline
School of Chemistry and Physics : Physics and Mathematical Physics
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©1999 American Physical Society