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Models for Pion-Nucleus Reactions

  • Frieder Lenz

Abstract

The theoretical concepts, to describe the pion-nucleus dynamics, have been developed almost exclusively within the context of investigations of elastic pion-nucleus scattering. The large body of experimental data on nuclear excitations in pion scattering has had little impact on our theoretical understanding of the pion nucleus interaction. First order theories, generally used to describe these processes, are too poor in their dynamical content. As is well known by now from the study of elastic scattering, there is no theoretical basis for a description of pion-nucleus scattering in terms of free pion-nucleon scattering. Pion nucleus elastic scattering can only be understood if one allows for large modifications if the pion nucleon interaction takes place in the nuclear environment. For pion scattering in the resonance region, the Δ-h formalism has proved to be particularly useful to account for these medium corrections. In the first part of this talk, I shall give a brief summary of the results obtained in applying the Δ-h formalism to elastic pion nucleus scattering.

Keywords

Elastic Scattering Vector Coupling Nucleus Interaction Magnetization Current Tensor Coupling 
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Copyright information

© Plenum Press, New York 1984

Authors and Affiliations

  • Frieder Lenz
    • 1
  1. 1.SINVilligenSwitzerland

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