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η Production in proton-nucleus reactions

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Zeitschrift für Physik A Hadrons and Nuclei

Abstract

The production ofη-mesons in proton-nucleus reactions is analysed with respect to primary nucleon-nucleon (NN→NNη) and secondary pion-nucleon (πN→ηN) production processes on the basis of Hartree-Fock groundstate momentum distributions and free on-shell production processes. The folding model adopted compares well for meson production with more involved simulations based on VUU transport equations. Similar to K+ production in proton-nucleus reactions theη-mesons are primarily produced by theπN →ηN channel. However,η-mesons are absorbed in nuclei via excitation of the N* (1535) resonance which leads to strong distortions of the primordial spectra. On the other hand, the experimental mass dependence of the differential cross sections might yield information about the in-medium properties of this resonance.

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Authors and Affiliations

  1. Institut für Theoretische Physik, Justus-Liebig-Universität Giessen, Heinrich-Buff-Ring 16, W-6300, Giessen, Federal Republic of Germany

    W. Cassing, G. Batko, T. Vetter & G. Wolf

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  1. W. Cassing
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  2. G. Batko
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  3. T. Vetter
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  4. G. Wolf
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Additional information

Supported by BMFT, GSI Darmstadt and Forschungszentrum Jülich, Federal Republic of Germany

The authors acknowledge stimulating discussions with V. Metag and U. Mosel throughout the course of this study. Furthermore, they like to thank E. Vercellin for pointing out a computational error in an earlier version of this work.

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Cassing, W., Batko, G., Vetter, T. et al. η Production in proton-nucleus reactions. Z. Physik A - Hadrons and Nuclei 340, 51–57 (1991). https://doi.org/10.1007/BF01284480

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  • DOI: https://doi.org/10.1007/BF01284480

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