B.Ermolaev, S.Troyan

Total resummation of leading logarithmic contributions to the spin structure function g_1 versus the Standard Approach.

Standard Approach (SA) to description of g_1 is based on the DGLAP evolution equations complemented with special fits for the initial parton densities. Those fits have a quite complicated structure and include singular factors which mimic the total resummation of leading logarithms of x. When the resummation is accounted for, the singular factors must be dropped, so new expressions for the fits become much simpler. Besides, SA can operate in the region of large Q^2 only whereas our approach can be used for large and small Q^2 equally.