Nonlinear Phenomena in Complex Systems, 1999, Vol.2, No.4, pp.78--88

NONLINEAR PHENOMENA IN COMPLEX SYSTEMS
An Interdisciplinary Journal

1999, Volume 2, Number 4, pp.78--88

Revising Moment Problems of Polarized Densities in Quantum Chromodynamics.
A. Ruffing, D. Heim, C. Dingwall, U. Pforzheimer, B. Lampe

The sensititivity of various future polarization experiments to the first moment Delta g of the polarized gluon density is elucidated in detail. It is shown to what extent the first moment can be extracted from the future data as compared to the higher moments. We concentrate on two processes which in the near future will become an important source of information on the polarized gluon density, namely the photoproduction of open charm to be studied at CERN (COMPASS) and SLAC and the production of direct photons at RHIC.

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