Models for Pion-Nucleus Reactions

  • Frieder Lenz


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.


Elastic Scattering Vector Coupling Nucleus Interaction Magnetization Current Tensor Coupling 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1).
    M. Hirata, F. Lenz and K. Yazaki, Ann. of Phys. 108 (1977) 116ADSCrossRefGoogle Scholar
  2. 1a).
    M. Hirata, J.H. Koch, F. Lenz and E.J. Honiz, Ann. of Phys. 120 (1979) 205ADSCrossRefGoogle Scholar
  3. 1b).
    Y. Horikawa, M. Thies and F. Lenz, Nucl. Phys. A345 (1980) 386ADSGoogle Scholar
  4. 2).
    F. Binon, P. Duteil, J.P. Garron, J. Gorres, L. Hugon, J.P. Peigneux, C. Schmitt, M. Spighel and J.P. Stroot, Nucl. Phys. B17 (1970) 168ADSCrossRefGoogle Scholar
  5. 2a).
    J. Piffaretti, R. Corfu, J.P. Egger, P. Gretillat, C. Lunke and E. Schwarz, Phys. Lett. 67B (1977) 289ADSGoogle Scholar
  6. 2b).
    J. Piffaretti, R. Corfu, J.P. Egger, C. Lunke, E. Schwarz, C. Perrin and B.M. Preedom, Phys. Lett. 71B (1977) 324; E. Schwarz et al., private communication.ADSGoogle Scholar
  7. 3).
    H. Byfield, J. Kessler and L.N. Lederman, Phys. Rev. 86 (1952) 17ADSCrossRefGoogle Scholar
  8. 3a).
    E. Bellotti, D. Cavalli and C. Matteuzzi, Nuovo Cim. 18A (1973) 75ADSCrossRefGoogle Scholar
  9. 3b).
    I. Navon, D. Ashery, G. Azuelos, H.J. Pfeiffer, H.K. Walter and F.W. Schlepuetz, Phys. Rev. 22C (1979) 717ADSGoogle Scholar
  10. 3c).
    R.M. Edelstein, W.F. Baker and F. Rainwater, Phys. Rev. 122 (1961) 252ADSCrossRefGoogle Scholar
  11. 4).
    M. Hirata, F. Lenz and M. Thies, to be publishedGoogle Scholar
  12. 5).
    F. Lenz, M. Thies and Y. Horikawa, Ann. of Phys. 140 (1982) 266.ADSCrossRefGoogle Scholar
  13. 6).
    J. Flanz, Dissertation, Univ. of Massachusetts (1979), and references therein. J. Flanz, R.S. Hicks, R.A. Lindgren, G.A. Peterson, J. Dubach and W.C. Haxton, Phys. Rev. Lett. 43 (1979) 1922ADSCrossRefGoogle Scholar
  14. 7).
    C.L. Morris, K.G. Boyer, C.F. Moore, C.J. Harvey, K.J. Kallianpur, I.B. Moore, P.A. Seidl, S.J. Seestrom-Morris, D.B. Holtkamp, S.J. Greene and W.B. Cottingame, Phys. Rev. C24 (1981) 231 “Research in Experimental Nuclear Physics”, W.J. Braithwaite and C.F. Moore, LASL preprint distributed at the Workshop on “Nuclear Structure with Intermediate Energy probes” Jan. 14–16, 1980 J.P. Egger, private communicationADSGoogle Scholar
  15. 8).
    C.L. Morris, W.B. Cottingame, S.J. Greene, C.J. Harvey, C.F. Moore, D.B. Holtkamp, S.J. Seestrom-Morris and T. Fortune, Phys. Lett. 108B (1982) 172ADSGoogle Scholar
  16. 9).
    E. Piasetzky, D. Ashery, A. Altman, A.I. Yavin, F.W. Schlepütz, R.J. Powers, W. Berti, L. Felawka, H.K. Walter, R.G. Winter and J.v.d. Pluym, Phys. Rev. 25C (1982) 2687ADSGoogle Scholar
  17. 10).
    Th. S. Bauer, J.J. Domingo, Q. Ingram, J. Jansen, G.Kyle, J. Zichy, R. Stamminger, F. Vogler, private communication.Google Scholar

Copyright information

© Plenum Press, New York 1984

Authors and Affiliations

  • Frieder Lenz
    • 1
  1. 1.SINVilligenSwitzerland

Personalised recommendations