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THE ROLE OF HIGHER TWIST IN QCD FITS TO THE POLARIZED DIS DATA
Leader E., Sidorov A. V., Stamenov D. B.
Different methods to extract the polarized parton densities
from the world polarized DIS data are considered. The higher twist corrections
hN(x)/Q2 to the spin-dependent
proton and neutron g1 structure functions are found
to be non-negligible and important in the QCD analysis of the present
experimental data. Their role in determining the polarized parton densities
in the framework of the different approaches is discussed. The values
of the quark and gluon polarizations are presented and their dependence
on the factorization scheme employed is considered.
PDF (298 Kb)
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