Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/10899
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Type: | Journal article |
Title: | Isospin-breaking vector meson decay constants from continuous families of finite energy sum rules |
Author: | Maltman, Kim Wolfe, Carl E. |
Citation: | Physical Review D, 1999; 59(9):096003 |
Publisher: | American Physical Society |
Issue Date: | 1999 |
ISSN: | 0556-2821 |
School/Discipline: | School of Chemistry and Physics : Physics and Mathematical Physics |
Statement of Responsibility: | Kim Maltman and C. E. Wolfe |
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. |
Rights: | ©1999 American Physical Society |
DOI: | 10.1103/PhysRevD.59.096003 |
Appears in Collections: | Special Research Centre for the Subatomic Structure of Matter publications |
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