Spin effects in the fragmentation of a transversely polarized quark

Details Spin effects in the fragmentation of a transversely polarized quark Spin effects in the fragmentation of a transversely polarized quark

2000-02-10

arxiv.org/abs/hep-ph/0002120v2

Phys.Lett. B483 (2000) 74-86

Physics

High Energy Physics

High Energy Physics - Phenomenology

18+1 pages, LaTeX, 5 eps figures, uses epsfig.sty; v2: Some technical problems in dimensions of Figs. 2 and 3 removed

Scientific paper

10.1016/S0370-2693(00)00519-0

An azimuthal dependence of pions produced in polarized Deep Inelastic Scattering, gamma^* - p(transv. polarized) -> pion + X, has been recently observed and might be related to the so-called Collins effect. We discuss in details, for a general spin configuration of the nucleon, the kinematics of the process and methods of extracting information on the fragmentation properties of a polarized quark. Assuming that the observed azimuthal dependence is indeed due to Collins effect, we derive a lower bound estimate for the size of the quark analysing power, which turns out to be large.

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