The Correlator of Topological Charge Densities at low Q² in QCD

1998/11/02 by B. L. Ioffe, Ioffe, B. L.
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High Energy Physics - Theory (hep-th) #hep-ph #hep-th

paper · pdf · doi:10.48550/arxiv.hep-ph/9811217

17 p., no figures, Revtex

arxiv created 1998/11/02 · arxiv updated 2009/11/30

Abstract

The correlator of topological charge densities χ(Q²) in QCD is calculated in the domain of low Q². Basing on the Ward identities the low energy theorems are proved. The value of the first derivative χ^′(0) found recently by QCD sum rules \cite1 is used. The contributions of pseudoscalar quasi-Goldstone bosons as intermediate states in the correlator are calculated with the account of η-π mixing.

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