2003/05/31 by V. Cirigliano, Vincenzo Cirigliano, Eugene Golowich +3 · 4 citations
Physics and Astronomy · #Algorithm #Computer science #High-Energy Particle Collisions Research #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #hep-ph
paper · pdf · doi:10.1103/physrevd.68.054013
published as Phys.Rev. D68 (2003) 054013 · 43 pages, 8 figures (higher definition plots available from authors), 2 tables, comment added in Sect. IVC
arxiv created 2003/07/14 · openalex publication_date 2003/09/15 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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\ensuremath-A correlator in terms of existing hadronic \ensuremathτ 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 \stackrel\ensuremath→K\ensuremathπ\ensuremathπ matrix elements of the electroweak penguin operator in the chiral limit, may be reduced to below the \ensuremath∼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.