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Type: Journal article
Title: QCD condensates for the light quark V-A correlator
Author: Cirigliano, Vincenzo
Golowich, Eugene
Maltman, Kim
Citation: Physical Review D, 2003; 68(5):054013
Publisher: American Physical Society
Issue Date: 2003
ISSN: 0556-2821
School/Discipline: School of Chemistry and Physics : Physics and Mathematical Physics
Organisation: Special Research Centre for the Subatomic Structure of Matter
Statement of
Vincenzo Cirigliano, Eugene Golowich, Kim Maltman
Abstract: We use the procedure of pinched-weight finite energy sum rules to determine the operator product expansion (OPE) coefficients a6,…,a16 of the flavor ud V-A correlator in terms of existing hadronic τ decay data. We show by appropriate weight choices that the error on the dominant d=6 contribution, which is known to be related to the K→ππ matrix elements of the electroweak penguin operator in the chiral limit, may be reduced to below the ∼15% level. The values we obtain for OPE coefficients with d>8 are shown to naturally account for the discrepancies between our results for the d=6 and d=8 terms and those of previous analyses, which were obtained neglecting d>8 contributions.
Rights: ©2003 American Physical Society
DOI: 10.1103/PhysRevD.68.054013
Appears in Collections:Special Research Centre for the Subatomic Structure of Matter publications

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