Measuring Polarized Gluon and Quark Distributions with Meson Photoproduction

Details Measuring Polarized Gluon and Quark Distributions with Meson Photoproduction Measuring Polarized Gluon and Quark Distributions with Meson Photoproduction

1997-06-27

arxiv.org/abs/hep-ph/9706522v3

Phys.Rev. D58 (1998) 054007

Physics

High Energy Physics

High Energy Physics - Phenomenology

RevTeX, 11 pages, 13 postscript figures; changes made in response to the referee's comments

Scientific paper

10.1103/PhysRevD.58.054007

We calculate polarization asymmetries in photoproduction of high transverse momentum mesons, focusing on charged pions, considering the direct, fragmentation, and resolved photon processes. The results at very high meson momentum measure the polarized quark distributions and are sensitive to differences among the existing models. The results at moderate meson momentum are sensitive to the polarized gluon distribution and can provide a good way to measure it. Suitable data may come as a by-product of deep inelastic experiments to measure $g_1$ or from dedicated experiments.

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