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Production of hyperfragments from the interactions of 3.0 GeV/c and 5.0 GeV/c K- mesons with emulsion nuclei

par Lemonne, Jacques ;Sacton, Jean ;Schorochoff, Guy ;O'Sullivan, Denis;Shah, T.P. T.P.;Thompson, Alan;Heeran, Sr M.;Montwill, Alexander;Stanley, R.D. R.D.;Shaukat, M.A.;Toner, William W.T.;Allen, P. M G;Davis, Dudley;Fletcher, E.R.;Allen, John;Bull, V.A.;Conway, A.P.;Kasim, M.M. M.M.;March, P.V.;Pniewska, K.;Pniewski, T.;Votruba, Marcela;Suk, Michal;Vintr, Z.;Filipkowski, A.;Herynek, I.;Piekarz, J.;Zakrzewski, J.A.
Référence Nuovo cimento. A., 41, 2, page (235-248)
Publication Publié, 1966-01

Article révisé par les pairs

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Résumé :

A study has been made of the production of hyperfragments by the interactions of K--mesons of 3.0 and 5.0 GeV/c momentum in nuclear emulsion. The observed frequencies of production, (3.0±0.1)% and (2.2±0.1)% respectively, are significantly smaller than at lower K--meson momenta, while the range distributions show a relative increase in the number of hyperfragments of range greater than 5 μm. This increase is attributed to a larger contribution from the fragmentation process, which is especially significant at intermediate ranges [(10÷50) μm], and to greater mean ranges for the heavy hyperfragments, which broaden the peak at short ranges (≤10 μm). The hyperfragments of range less than 10 μm are mainly heavy residual products of silver and bromine nuclei; their mass numbers differ on the average from those of the parent nuclei by about 30 and 35 nucleon masses for 3.0 and 5.0 GeV/c interactions respectively. Eight examples of π- mesonic decays of heavy hyperfragments, and one probable example of a double hyperfragment, have been observed. © 1966 Società Italiana di Fisica.