Gauge symmetry and the EMC spin effect

Details Gauge symmetry and the EMC spin effect Gauge symmetry and the EMC spin effect

1993-05-26

arxiv.org/abs/hep-ph/9305323v1

Z.Phys. C60 (1993) 343-348

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, Latex, Cavendish preprint HEP 93/2

Scientific paper

10.1007/BF01474632

We emphasise the EMC spin effect as a problem of symmetry and discuss the renormalisation of the $C=+1$ axial tensor operators. This involves the generalisation of the Adler-Bell-Jackiw anomaly to each of these operators. We find that the contribution of the axial anomaly to the spin dependent structure function $g_1 (x, Q^2)$ scales at $O(\alpha_s)$. This means that the anomaly can be a large $x$ effect in $g_1$. Finally we discuss the jet signature of the anomaly.

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