Dilepton production from collisions of polarized spin-½ hadrons. II. Parton-model predictions

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Abstract
Parton-model predictions for lepton-pair production from polarized spin-½ particles are considered within the context of a formalism explained in a companion paper. The polarization effects in the quantum-chromodynamic 2→2 subprocesses which contribute to lepton-pair production are found to be quite simple. Following the work of Ralston and Soper, polarized distribution functions are defined for gluons as well as quarks. Finally, a detailed discusson of polarization and the hard-scattering formalism is presented for the two cases of intrinsic parton transverse momentum allowed or forbidden.