Spin Structure of the Nucleon

Abstract

New experimental results on the spin dependent structure functions g_1 and g_2 which are determined from deep-inelastic scattering experiments at CERN, SLAC and DESY are reported. These results are used to evaluate the Bjorken sum rule and the singlet axial charge a_0. Results are discussed in the framework of next-to-leading order perturbative QCD. The role of the polarised gluons in the interpretation of the results on a_0 is emphasised. New experiments which aim to determine gluon polarisation are shortly described.

Comments: Plenary talk presented at the XXVII International Conference on High Energy Physics, 25-31 July, Warsaw, Poland; to be published in the Proceedings. Two-column 15 pages, TEX 2.09, 17 figures embedded in the text. Replaced to correct layout of figures