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Abstract
We examine the recent COMPASS data on the spin structure function g1 singlet. We show that it is rather difficult to use the data in the present form in order to draw conclusions on the initial parton densities. However, our tentative estimate is that the data better agree with positive than with negative initial gluon densities.
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1 Ioffe Physico-Technical Institute, St. Petersburg, Russia
2 Department of Physics and INFN, University Rome III, Rome, Italy
3 St. Petersburg Institute of Nuclear Physics, Gatchina, Russia





