Spin Effects in Hadronic Collisions at Large Momentum Transfers

摘要

The role of the spin in hadron-hadron collisions at large psub(perpendicular) is investigated. The short distance diagrams and the end-point (x-1) contribution give phenomenologically similar results for the elastic nucleon-nucleon differential cross-section but differ significantly when looking at the spin-spin asymmetries. The spin analysis suggests the dominance of the end-point diagrams at large angles and present energies. The limits on the nucleon wave function are obtained from the comparison of spin effects in exclusive and inclusive reactions. Higher order results exclusive channels are reviewed. In the inclusive production we propose a simple model of baryon polarization at large transverse momentum which accounts qualitatively for all experimental data in these processes. Other models are also reviewed. The whole investigation suggests that the spin effects are a relatively clear probe of the complicated hadron dynamics. (Atomindex citation 17:020669)