Single spin asymmetries in inclusive high energy hadron-hadron collision processes

Details Single spin asymmetries in inclusive high energy hadron-hadron collision processes Single spin asymmetries in inclusive high energy hadron-hadron collision processes

2000-01-31

arxiv.org/abs/hep-ph/0001330v1

Int.J.Mod.Phys. A15 (2000) 927-982

Physics

High Energy Physics

High Energy Physics - Phenomenology

62 pages, 17 ps-figures (Review article to appear in Inter. J. Mod. Phys. A)

Scientific paper

10.1142/S0217751X0000046X

It has been realized for quite a long time that single-spin experiments, in which one of the colliding objects is transversely polarized, can be helpful in studying the properties of strong interaction in general and in testing Quantum Chromodynamics (QCD) in particular. Striking effects have been observed in the past few years which deviate drastically from the expectation of the perturbative QCD parton model. These effects have received much attention. New experiments of the similar type are underway and/or planned. Different theoretical attempts have been made to understand these effects. In this review, the special role played by singly polarized high-energy hadron-hadron collisions in High Energy Spin Physics is emphasized. Characteristics of the available data for inclusive hadron productions are briefly summarized. Different theoretical approaches for such processes are reviewed with special attention to a non-perturbative model which explicitly takes the orbital motion of the valence quarks and hadronic surface effects into account. The connection between such asymmetries and hyperon polarization in unpolarized reactions is discussed. An example of the possible application of such experimental results in other processes is given.

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