Pion-nucleus optical potential in the isobar-doorway model

A. N. Saharia, R. M. Woloshyn, and L. S. Kisslinger
Phys. Rev. C 23, 2140 – Published 1 May 1981
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Abstract

The isobar-doorway model is used to parametrize the pion-nucleus optical potential so as to take into account the interaction of the Δ with other nucleons as well as coupling to inelastic and reaction channels. The parameters of the model are determined by fitting elastic scattering angular distributions. It is found that the nonlocality associated with the isobar propagation is important in the resonance energy region. This may indicate that the use of impulse approximation in obtaining the pion optical potential may be doubtful even if we introduce a complex shift in the energy at which the pion-nucleon scattering amplitude is evaluated to get a first-order optical potential.

NUCLEAR REACTIONS Pion-nucleus optical potential, parametrization of many-body modifications to the isobar propagator, σ(θ) and σ for O16, C12, and He4 in the energy range 110-250 MeV.

  • Received 17 September 1980

DOI:https://doi.org/10.1103/PhysRevC.23.2140

©1981 American Physical Society

Authors & Affiliations

A. N. Saharia* and R. M. Woloshyn

  • TRIUMF, Vancouver, British Columbia, Canada, V6T 2A3

L. S. Kisslinger

  • Carnegie-Mellon University, Pittsburgh, Pennsylvania 15213

  • *Present address: Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627.

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Issue

Vol. 23, Iss. 5 — May 1981

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