Current correlators in QCD: OPE versus large distance dynamics

Details Current correlators in QCD: OPE versus large distance dynamics Current correlators in QCD: OPE versus large distance dynamics

2004-06-24

arxiv.org/abs/hep-ph/0406276v1

Phys.Rev. D70 (2004) 074012

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX, 25 pages, 13 figures

Scientific paper

10.1103/PhysRevD.70.074012

We analyse the structure of current-current correlators in coordinate space in large $N_c$ limit when the corresponding spectral density takes the form of an infinite sum over hadron poles. The latter are computed in the QCD string model with quarks at the ends, including the lowest states, for all channels. The corresponding correlators demonstrate reasonable qualitative agreement with the lattice data without any additional fits. Different issues concerning the structure of the short distance OPE are discussed.

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