Violation of the Bjorken Sum Rule in QCD

Details Violation of the Bjorken Sum Rule in QCD Violation of the Bjorken Sum Rule in QCD

1992-11-07

arxiv.org/abs/hep-ph/9211227v2

Phys.Lett. B309 (1993) 174-178

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, no figures (several typos and a numerical error on pag. 5 corrected)

Scientific paper

10.1016/0370-2693(93)91522-O

We show that the Bjorken sum rule for the first moment of the polarized
nucleon structure function $g_1$ is not necessarily satisfied in QCD if the
axial anomaly is taken into account. We argue that nonperturbative QCD effects
should lead to a violation of the sum rule of the order of the percentage
isospin violation in current quark masses.

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