RADIATIVE GLUON EFFECTS IN QUARK-ANTIQUARK PRODUCTION IN COLLISIONS OF POLARIZED ELECTRONS AND POSITRONS

The cross section in terms of three independent radiative gluon correction form factors related to angular dependence and angular asymmetry is calculated as functions of the maximum recorded scaled gluon momentum X(g), with 0 < X(g) less-than-or-equal-to 1. The effects of longitudinal and transversal polarization of the initial electron and positron are taken into account. For the same geometry the two independent thrust form factors are obtained as functions of the minimum thrust T(m) recorded, with 2/3 less-than-or-equal-to T(m) < 1. Similarly the related invariant mass form factors are obtained. In particular, the regions of infrared gluons, X(g) much less than m2/s, and of near infrared gluons, m2/s/much less than X(g) much less than m/square-root s, are discussed.