Duality violation in QCD Sum Rules with the LR correlator
High Energy Physics - Phenomenology
2011-02-15 v1
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.
Cite
@article{arxiv.1010.1219,
title = {Duality violation in QCD Sum Rules with the LR correlator},
author = {Martín González-Alonso and Antonio Pich and Joaquim Prades},
journal= {arXiv preprint arXiv:1010.1219},
year = {2011}
}
Comments
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)