Process of inclusive electroproduction of pseudoscalar mesons on proton: separation of the contribution of strange quark in proton spin

Problem to separate the pure contribution of strange quarks into proton spin in the course of the inclusive electroproduction of mesons on proton: ep → e'Mx, where M are pseudoscalar Κ+-, Κ0, Κ-bar0, π+- mesons, is under study. In terms of the quark-parton model one determined the correlation effective cross sections for production of mesons. The analytical expression is derived to determine the contribution of s-quarks into proton spin. The measuring of ΔσΚ and Δσπ correlation effective cross sections and the application of fragmentation functions are shown to enable to glean important information on the proton spin structure