Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/11128
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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 Responsibility: | 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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