Self-Consistent Data Analysis of the Proton Structure Function g1 and Extraction of its Moments

The reanalysis of all available world data on the longitudinal asymmetry A{sub {parallel}} is presented. The proton structure function g1 was extracted within a unique framework of data inputs and assumptions. These data allowed for a reliable evaluation of moments of the structure function g{sub 1} in the Q{sup 2} range from 0.2 up to 30 GeV{sup 2}. The Q{sup 2} evolution of the moments was studied in QCD by means of Operator Product Expansion (OPE).