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The high-energy hadron spin-flip amplitude at small momentum transfer and new AN data from RHIC

J. R. Cudell·E. Predazzi·O. V. Selyugin
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Abstract

In the case of elastic high-energy hadron-hadron scattering, the impact of the large-distance contributions on the behaviour of the slopes of the spin-non-flip and of the spin-flip amplitudes is analysed. It is shown that the long tail of the hadronic potential in impact parameter space leads to a value of the slope of the reduced spin-flip amplitude larger than that of the spin-non-flip amplitude. This effect is taken into account in the calculation of the analysing power in proton-nucleus reactions at high energies. It is shown that the preliminary measurement of AN obtained by the E950 Collaboration indeed favour a spin-flip-amplitude with a large slope. Predictions for AN at pL = 250 GeV/c are given.

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J. R. Cudell, E. Predazzi, O. V. Selyugin. 2004-05-20. The high-energy hadron spin-flip amplitude at small momentum transfer and new AN data from RHIC. https://doi.org/10.1140/epja%2Fi2004-10012-2

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