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Hadronic Spin Dependence and the Use of Coulomb-Nuclear Interference as a Polarimeter

T. L. Trueman

hep-pharXiv:hep-ph/9610316

Abstract

Coulomb-nuclear interference in the single transverse spin asymmetry AN is often considered as a possible absolute polarimeter for proton beams. The main uncertainty in this is the unknown hadronic spin-flip amplitude. This uncertainty is analyzed here in the context of the challenge of a 5% polarization measurement at RHIC. Possible constraints on the spin-flip amplitude from measurements of the differential cross-section and the double transverse spin asymmetry ANN are discussed.

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