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The interaction and decay of K- mesons in photographic emulsion - Part I. General characteristics of K--Interactions and analysis of events in which a charged π-meson is emitted

par Bhowmik, B.;Evans, David;Falla, D.;Hassan, F.;Kamal, A.A. A.A.;Nagpaul, K.K. K.K.;Prowse, D.J. D.J.;Rene, Monique ;Alexander, G.;Johnston, R.H.W. R.H.W.;O'Ceallaigh, C.;Keefe, D.;Burhop, E. H S;Davis, Dudley;Kumar, Rajendra R.C.;Lasich, W.B. W.B.;Shaukat, M.A.;Bacchella, G.L.;Bonetti, A;Dilworth, Constance ;Occhialini, Guiseppe ;Scarsi, Livio;Guerriero, L.;Grilli, M.;von Lindern, L.;Merlin, M.;Salandin, A.;Stannard, Russell
Référence Il Nuovo cimento, 13, 4, page (690-729)
Publication Publié, 1959-08

Article révisé par les pairs

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Résumé :

A total of 3 480 K--mesons has been observed. Of these 445 interact in flight, at a mean energy of 40 MeV and only their general characteristics have been studied. Little difference has been observed between the number of unstable charged particles (Σ±-hypersons and π±-mesons) in these interactions and those in the 3 035 interactions at rest. The 3 035 K--interactions at rest have been studied in detail. In this paper (Part I) are given the results on those interactions in which π-mesons are emitted. An estimate of the Σ-hyperon nuclear potential is based on the energy spectrum of π-mesons emitted in the K--interactions in which the only charged particles emitted are a π-meson and a Σ-hyperon. A detailed examination of the angular distribution of 2-pronged events, and of the sign ratio of the π-mesons, the prong distribution and energy release in all events has led to an estimate of the probabilities of absorption of positive and negative Σ-hyperons in the parent nucleus, and to a partition of the events between the various primary reactions. © 1959 Società Italiana di Fisica.