MEASUREMENT OF THE DOUBLE SPIN ASYMMETRY IN THE PHOTOPRODUCTION OF HIGH-P_T HADRONS AT HERMES

摘要

A measurement of the spin asymmetry A_‖ in the quasi-real photoproduction of pairs of high-p_T hadrons, pions and kaons is presented. The data were accumulated by the HERMES experiment from 1996 until 2000 using polarized atomic hydrogen and deuterium targets internal to the 27.6 GeV polarized HERA positron beam.