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

M. Kh Khankhasayev, H. Sarafian, Mikkel B. Johnson, Zh B. Kurmanov

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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(+, -)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.

Original languageEnglish (US)
Pages (from-to)1424-1435
Number of pages12
JournalPhysical Review C
Volume50
Issue number3
DOIs
StatePublished - Jan 1 1994

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All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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