THE QCD BEHAVIOUR FOR THE VALENCE QUARK DISTRIBUTION FUNCTION OF PION IN THE LEADING LOGARITHM APPROXIMATION AND RELEVANT DIFFERENTIAL CROSS-SECTION

Using the analytic expression for valence quark distribution function of hadron in the leading logarithm approximation given by paper^11], we discuss the QCD behaviour for the valence quark distribution function of pion. The existing data for valence quark distribution function of pion are explained excellently. We also predict the differential cross section M³ dσ/dM for massive lepton pairr production with Drell-Yan mechanism and compare it with data.