The `Proton Spin' Effect - Theoretical Status '97

Abstract

The theoretical status of the `proton spin' effect is reviewed. The conventional QCD parton model analysis of polarised DIS is compared with a complementary approach, the composite operator propagator-vertex (CPV) method, each of which provides its own insight into the origin of the observed suppression in the first moment of $g_1^p$. The current status of both experiment and non-perturbative calculations is summarised. The future role of semi-inclusive DIS experiments, in both the current and target fragmentation regions, is described.

Review talk at QCD97 Montpellier, July 1997. 12 pages, LaTeX, incl. 13 figures. Typo corrected in eq(36)

References in corpus (2)

• Determination of the Bjorken Sum and Strong Coupling from Polarized Structure Functions
• The (alpha_s)^3 approximation of Quantum Chromodynamics to the Ellis-Jaffe sum rule

Cited by in corpus (6)

• The Gauge-Invariant Angular Momentum Sum-Rule for the Proton
• Is nucleon spin structure inconsistent with constituent quark model?
• Radiative ${\eta }^{\prime }$ Decays, the Topological Susceptibility and the Witten-Veneziano Mass Formula
• The Angular Momentum and g_1^p Sum Rules for the Proton
• The U(1)_A Anomaly and QCD Phenomenology
• Target Fragmentation in Semi-Inclusive DIS: Fracture Functions, Cut Vertices and the OPE