Effect of pion external distortion on low-energy pion double charge exchange

M. Kh. Khankhasayev, H. Sarafian, Mikkel B. Johnson, and Zh. B. Kurmanov
Phys. Rev. C 50, 1424 – Published 1 September 1994
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Abstract

We simplify a treatment of pion distortions using a separable expansion of optical potential in momentum space. We use this method to gain insight into the role of distortions in isoelastic pion charge-exchange scattering within the framework of the isospin-invariant optical model. The method provides an analytic procedure for calculating external distortions for single- and double-charge-exchange scattering. This allows us to analyze separately the role of on- and off-shell pions in distortions for each partial wave. Results for sequential scattering at 50 MeV for the reaction C14(π+,π)14 O are presented. It is shown that the external distortions give a small enhancement in forward directions and reduce the differential cross sections at large angles.

  • Received 3 May 1993

DOI:https://doi.org/10.1103/PhysRevC.50.1424

©1994 American Physical Society

Authors & Affiliations

M. Kh. Khankhasayev

  • Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna 141980, Russia

H. Sarafian

  • Department of Physics, Pennsylvania State University, York, Pennsylvania 17403

Mikkel B. Johnson

  • Los Alamos National Laboratory, Los Alamos, New Mexico 87545

Zh. B. Kurmanov

  • Institute of Nuclear Physics, National Nuclear Center, Alma-Ata 480082, Republic of Kazakhstan

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Vol. 50, Iss. 3 — September 1994

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