Strange Isosinglet Versus Octet Scalar Axial Current

Details Strange Isosinglet Versus Octet Scalar Axial Current Strange Isosinglet Versus Octet Scalar Axial Current

1998-01-19

arxiv.org/abs/nucl-th/9801030v2

Phys. Rev. D 58 (1998) 117901

Physics

Nuclear Physics

Nuclear Theory

5 pages RevTex; replaced by the version accepted for publication in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.58.117901

The flavor SU(3)_f group symmetry of QCD is systematically considered as the heavy c quark limit of SU(4)_f. Within that scheme we argue that the U(1)_A anomaly prevents Gell-Mann's choice for the realization of the su(4)_f (and thereby the su(3)_f) algebra for the particular case of the neutral axial currents. Rather, Weyl's choice for the SU(4)_f generators has to be used which leads to a neutral strong axial current having same structure (up to a constant factor) as the weak one.

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