TOPOLOGICAL CHARGE SCREENING AND THE 'PROTON SPIN' BEYOND THE CHIRAL LIMIT

@article{Narison1999TOPOLOGICALCS,
  title={TOPOLOGICAL CHARGE SCREENING AND THE 'PROTON SPIN' BEYOND THE CHIRAL LIMIT},
  author={S. Narison and G. Shore and G. Veneziano},
  journal={Nuclear Physics},
  year={1999},
  volume={546},
  pages={235-278}
}
Abstract The theory of the ‘proton spin’ effect proposed in our earlier papers is extended to include the chiral SU (3) symmetry breaking and flavour mixing induced by non-vanishing quark masses in QCD. The theoretical basis is the derivation of exact, unified Goldberger-Treiman (GT) relations valid beyond the chiral limit. The observed suppression in the flavour singlet axial charge a 0 ( Q 2 ) is explained by an anomalously small value for the slope of the singlet current correlation function… Expand

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