Nucleon Spin and the Mixing of Axial Vector Mesons

Details Nucleon Spin and the Mixing of Axial Vector Mesons Nucleon Spin and the Mixing of Axial Vector Mesons

1995-11-27

arxiv.org/abs/hep-ph/9511424v2

Phys.Rev.D53:6195-6202,1996

Physics

High Energy Physics

High Energy Physics - Phenomenology

Two references added and minor corrections made to match published version. 22 LaTex pages, submitted to Phys. Rev. D

Scientific paper

10.1103/PhysRevD.53.6195

It is shown that the QCD anomaly may lead to an abnormal mixing behavior of the axial vector mesons similar to the pseudoscalar mesons. These mixing effects, involving a gluonic axial vector state, generate a non-vanishing strange quark component in the nucleon. They reduce the matrix element of the singlet axial vector in comparison to the value obtained in a naive quark model. The results are in agreement with the data obtained in the polarized lepton-nucleon scattering experiments.

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