HARD PHOTON DISTRIBUTIONS IN E(-) ANNIHILATION PROCESS BY QEDPS()E()

The validity of a photon shower generator QEDPS is examined in detail. This is formulated based on the leading-logarithmic renormalization e quation for the electron structure function and it provides a photon s hower along the initial e(+/-). The main interest in the present work is to test the reliability of the generator to describe a process acco mpanying hard photons which are detected. For this purpose, by taking the HZ(0) production as the basic reaction, the total cross section an d some distributions of the hard photons are compared for the two case s that these photons come from either those generated by QEDPS or the hard process e(+)e(-) --> HZ(0) gamma ...gamma. The comparison perform ed for the single and the double hard photon yields satisfactory agree ment, demonstrating that the model is self-consistent.