ar X iv : h ep - p h / 97 10 36 7 v 2 1 6 O ct 1 99 7 1 The ‘ Proton Spin ’ Effect - Theoretical Status ’ 97

ar X iv : h ep - p h / 97 10 36 7 v 1 1 5 O ct 1 99 7 1 The ‘ Proton Spin ’ Effect - Theoretical Status ’

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 p 1. The current status of both experiment and non-perturbative cal...

ar X iv : h ep - p h / 97 10 24 9 v 1 6 O ct 1 99 7 HADRONIC PHYSICS FROM THE LATTICE

ar X iv : h ep - p h / 97 10 22 9 v 1 2 O ct 1 99 7 SLAC - PUB - 7663 October 1997 Z ′ INVESTIGATIONS AT FUTURE LEPTON

ar X iv : h ep - p h / 97 10 54 8 v 1 3 0 O ct 1 99 7 Chiral Perturbation Theory and Nucleon Polarizabilities ∗

Compton scattering offers in principle an intriguing new window on nucleon structure. Existing experiments and future programs are discussed and the state of theoretical understanding of such measurements are explored. Research supported in part by the National Science Foundation

ar X iv : h ep - p h / 97 11 22 6 v 1 4 N ov 1 99 7 Instantons and Polarized Structure Functions

The contribution of the quark-quark and quark-gluon interaction induced by instantons to the valence quark and proton spin-dependent structure functions g 1 (x, Q 2) is estimated within the instanton liquid model for QCD vacuum. It is shown, that this interaction leads to a rather large violation of the Ellis-Jaffe sum rule.