%0 Journal Article
%T Pinched weights and duality violation in QCD sum rules: A critical analysis
%A Gonzalez-Alonso, M.
%A Pich, A.
%A Prades, J.
%J Physical Review D
%D 2010
%V 82
%N 1
%I Amer Physical Soc
%@ 1550-7998
%G English
%F Gonzalez-Alonso_etal2010
%O ISI:000280470200001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=403), last updated on Wed, 23 Mar 2011 16:34:17 +0000
%X We analyze the so-called pinched weights, that are generally thought to reduce the violation of quarkhadron duality in finite-energy sum rules. After showing how this is not true in general, we explain how to address this question for the left-right correlator and any particular pinched weight, taking advantage of our previous work [1], where the possible high-energy behavior of the left-right spectral function was studied. In particular, we show that the use of pinched weights allows to determine with high accuracy the dimension six and eight contributions in the operator-product expansion, O-6 = (-4.3(-0.7)(+0.9)) x 10(-3) GeV6 and O-8 = (-7.2(-5.3)(+4.2)) x 10(-3) GeV8.
%R 10.1103/PhysRevD.82.014019
%U http://lanl.arxiv.org/abs/1004.4987
%U https://doi.org/10.1103/PhysRevD.82.014019
%P 014019-7pp