At the Bonn Isochronous Cyclotron the longitudinal analyzing power Az = 1/Pz(σ+-σ)/ (σ+-σ-) in proton-proton scattering is measured at 13.6 MeV. Az is found to be : Az = -(1.5 ± 0.5) 10-7. Systematic errors are suppressed by correlation techniques in the time domain and by automatic controls. A multilinear regression determines, by analyzing the noise of the system, the relevant systematic error contributions and corrects Az for these contributions.
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Eversheim et al. (1990) studied this question.
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