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arXiv · 1010.1219

Duality violation in QCD Sum Rules with the LR correlator

Martín González-Alonso·Antonio Pich·Joaquim Prades
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Abstract

We 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.

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Martín González-Alonso, Antonio Pich, Joaquim Prades. 2010-10-06. Duality violation in QCD Sum Rules with the LR correlator. https://doi.org/10.1016/j.nuclphysbps.2010.10.073

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