Hadron spectra from two-photon annihilation and jet production in the e+e- collision

A method to treat the single hadron spectra obtained from two-photon annihilation is discussed, provided that the inelastically scattered e+e- are determined experimentally. The total cross section arising from two-photon annihilation will give a direct information on the mass eigenvalue of quark. The way to study the scale breaking effect is given in terms of two-photon structure functions for various quarks in time-like region. (author)