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arXiv · hep-ph/9812428

Instantons and the singlet-coupling in the chiral quark model

T. P. Cheng·Ling-Fong Li
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Abstract

Chiral quark model with a broken-U(3) flavor symmetry can be interpreted as the effective theory of the instanton-dominated non-perturbative QCD. This naturally suggests the possibility of a negative singlet/octet coupling ratio, which has been found, in a previous publication, to be compatible with the phenomenological description of the nucleon spin-flavor structure.

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T. P. Cheng, Ling-Fong Li. 1998-12-18. Instantons and the singlet-coupling in the chiral quark model. https://doi.org/10.1103/physrevd.59.097503

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