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Partons and the EMC spin effect

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Zeitschrift für Physik C Particles and Fields

Abstract

We focus on the parton model and the role of the axial anomaly in polarised deep inelastic scattering. We show that the axial anomaly is relevant to each of the higher moments of the spin dependent structure functiong 1 (x) and not just the first moment. This result implies that the factorisation of mass singularities is not sufficient to define the parton model in spin dependent QCD. (It is certainly a necessary condition.) We also need to consider the locality of the photon parton interaction. The anomaly is observed over allx in the EMCg 1 (x) data.

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Authors and Affiliations

  1. Department of Physics and Mathematical Physics, University of Adelaide, G.P.O. Box 498, SA 5001, Adelaide, Australia

    S. D. Bass

  2. Rutherford Appleton Laboratory, Chilton, OX11 0QX, Didcot, UK

    S. D. Bass

  3. Department of Physics FM-15 and Institute for Nuclear Theory HN-12, University of Washington, 98195, Seattle, WA, USA

    S. D. Bass

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  1. S. D. Bass
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Address after 1st August 1992: Cavendish Laboratory, University of Cambridge, Madingley Road, Cambridge CB 3 0HE, UK

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Bass, S.D. Partons and the EMC spin effect. Z. Phys. C - Particles and Fields 55, 653–658 (1992). https://doi.org/10.1007/BF01561304

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  • DOI: https://doi.org/10.1007/BF01561304

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