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The Vector and Tensor Exchange Contributions to pi n --> pi n

Authors
  • Argyres, E.N.
  • Contogouris, A.P.
  • Ray, S.
  • Svec, M.
Publication Date
Feb 01, 1974
Identifiers
DOI: 10.1016/0003-4916(74)90283-8
OAI: oai:inspirehep.net:738
Source
INSPIRE-HEP
Keywords
License
Unknown
External links

Abstract

Using fixed- t dispersion relations together with experimental data on π − p → π 0 n we determine the real and imaginary parts of the s -channel helicity amplitudes (SHA) of the vector (ϱ) exchange contribution to πN → πN . The results are in good agreement with amplitude analyses. We also make comparison with finite-energy sum-rules (FESR) and discuss certain implications. Furthermore, on the basis of two-component duality and FESR we calculate the tensor ( f ) contribution. The t -structure of the resulting SHA is compared with independent information on hadronic tensor exchanges.

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