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delta. /sub 33/ dynamics in pion double charge exchange

Journal Article · · Phys. Rev. Lett.; (United States)
The authors calculate effects of direct meson-..delta../sub 33/ interactions on pion double charge exchange to isobaric analog states in /sup 18/O. Virtual ..delta../sub 33/'s in the ground state are shown to contribute negligibly, contrary to recent expectations. On-shell ..delta../sub 33/ interactions can have a large effect through ..pi..+rho exchange, and inclusion of these terms improves agreement with experiment below resonance. Data at the higher energies cannot be explained by a simple combination of sequential pion-nucleon scattering plus direct meson-..delta../sub 33/ terms.
Research Organization:
Los Alamos National Laboratory, Los Alamos, New Mexico 87545
OSTI ID:
6856348
Journal Information:
Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 52:8; ISSN PRLTA
Country of Publication:
United States
Language:
English

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