Instantons and the singlet-coupling in the chiral quark model

Details Instantons and the singlet-coupling in the chiral quark model Instantons and the singlet-coupling in the chiral quark model

1998-12-18

arxiv.org/abs/hep-ph/9812428v1

Phys.Rev. D59 (1999) 097503

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages

Scientific paper

10.1103/PhysRevD.59.097503

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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