Strange Isosinglet Versus Octet Scalar Axial Current
Abstract
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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