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High-energy hadron spin-flip amplitude at small momentum transfer and new A N data from RHIC

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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 A N for p 12C obtained by the E950 Collaboration indeed favours a spin-flip amplitude with a large slope. Predictions for A N at \(p_L = 250 \ \) GeV/c are given.

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Authors and Affiliations

  1. Institut de Physique, Université de Liége, Bât. B5a, B-4000, Sart Tilman, Liége, Belgium

    J.-R. Cudell & O. V. Selyugin

  2. Dipartimento di Fisica Teorica, Universitá di Torino and Sezione INFN di Torino, Torino, Italy

    E. Predazzi

Authors
  1. J.-R. Cudell
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  2. E. Predazzi
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  3. O. V. Selyugin
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Corresponding author

Correspondence to J.-R. Cudell.

Additional information

Communicated by A. Schäfer

Received: 9 January 2004, Revised: 17 March 2004, Published online: 14 September 2004

PACS:

13.85.Dz Elastic scattering - 13.85.Lg Total cross sections - 13.85.-t Hadron-induced high- and super-high-energy interactions (energy > 10 GeV)

O.V. Selyugin: On leave from the Bogoliubov Laboratory of Theoretical Physics, JINR, 141980, Dubna, Moscow Region, Russia;

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Cudell, JR., Predazzi, E. & Selyugin, O.V. High-energy hadron spin-flip amplitude at small momentum transfer and new A N data from RHIC. Eur. Phys. J. A 21, 479–486 (2004). https://doi.org/10.1140/epja/i2004-10012-2

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  • DOI: https://doi.org/10.1140/epja/i2004-10012-2

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