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A study of the Λπ-pd final state produced in K--meson interactions at rest in helium

par Roosen, Robert;Vander Velde, Catherine ;Wickens, John H. ;Comber, C.;Davis, Dudley;Tovee, D.N.
Référence Nuovo cimento. A., 49, 2, page (217-234)
Publication Publié, 1979-01

Article révisé par les pairs

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Résumé :

Results are presented of a bubble chamber study of K--meson interactions at rest in helium leading to the Λπ-pd final state. It is found that (75±1)% of this final state results from the two-step mechanism of internal Σ-Λ conversion via processes such as {Mathematical expression} followed by {Mathematical expression}. The experimental results are compared to the predictions of a double-impulse model, in which a contribution has been included from a Σ-Λ conversion process involving two nucleons in order to reproduce the baryon momentum spectra. The model is capable of explaining the features of the invariant-mass distributions of the finalstate particles without invoking resonance production. © 1979 Società Italiana di Fisica.