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Gauge symmetry and the EMC spin effect

May, 1993
19 pages
Published in:
  • Z.Phys.C 60 (1993) 343-348
e-Print:
DOI:
Report number:
  • CAVENDISH-HEP-93-2
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19941995199619971998421
Abstract:
We emphasise the EMC spin effect as a problem of symmetry and discuss the renormalisation of the C=+1C=+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 g1(x,Q 2)g_1 (x, Q~2) scales at O(αs)O(\alpha_s). This means that the anomaly can be a large xx effect in g1g_1. Finally we discuss the jet signature of the anomaly.
  • lepton nucleon: deep inelastic scattering
  • deep inelastic scattering: lepton nucleon
  • nucleon: structure function
  • structure function: spin
  • spin: structure function
  • anomaly: axial
  • operator product expansion
  • renormalization group
  • fusion: photon gluon
  • jet: pair production
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