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Duality violation in QCD Sum Rules with the LR correlator

AuthorsGonzález-Alonso, Martín ; Pich, Antonio ; Prades, Joaquim
Issue Date2010
CitationNuclear Physics B Proceedings Supplements 207-208: 285-289 (2010)
AbstractWe analyse the so-called violations of quark-hadron duality in Finite Energy Sum Rules with the LR correlator, through the study of the possible high-energy behavior of the LR spectral function, taking into account all known short-distance constraints and the experimental tau-decay data. 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^{+0.9}_{-0.7}) 10^{-3} GeV^6 and O_8 = (-7.2^{+4.2}_{-5.3}) 10^{-3} GeV^8.
Description5 páginas, 4 figuras.-- Dedicated to the memory of our colleague and friend Joaquim (Ximo) Prades.-- Talk given at the 15th International QCD Conference (Montpellier, 28th June - 3rd July 2010) and the Internation Light Cone 2010 Conference (Valencia, 14-18th June 2010).-- arXiv:1010.1219v1.
Publisher version (URL)http://dx.doi.org/10.1016/j.nuclphysbps.2010.10.073
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