Summary
Analysis of 384 K−-meson interactions in flight with complex nuclei of the emulsion obtained by following 102.93 meters of K− track length, is presented. The average mean free path in the energy interval (30÷180) MeV is found to be (26.82±1.39) cm. The variation of the interaction mean free path with K− energy is discussed. A study of K− inelastic scattering from emulsion nuclei has been made and it is concluded that the nuclear potential for K−-mesons is strongly attractive. The energy spectra of charged pions and hyperons emitted from K− interactions at these energies are discussed. It is shown that with increasing energy of the K−-meson the fractions, π−/π+ and Σ−/Σ+, also increase. The rates for various K−-single nucleon reactions have been determined. A comparison of these rates at different K− energies shows an enhancement in the direct Λ0 production.
Riassunto
Si presenta l’analisi di 384 interazioni in volo di mesoni K− con i nuclei complessi dell’emulsione, ottenute seguendo 102.93 metri di lunghezza di tracce di K−. Si trova che il cammino libero medio nell’intervallo di energie (30÷180) MeV è in media (26.82±1.39) cm. Si discute la variazione del cammino libero medio di interazione con l’energia dei K−. Si è eseguito uno studio dello scattering inelastico dei K− da parte dei nuclei dell’emulsione e si conclude che il potenziale nucleare dei mesoni K− è fortemente attrattivo. Si discutono gli spettri di energia dei pioni carichi e degli iperoni emessi dalle interazioni di K− di tali energie. Si dimostra che al crescere dell’energia del mesone K− crescono anche le frazioni π−/π+ e Σ−/Σ+. Si sono determinate le proporzioni delle varie reazioni K−-nucleone singolo. Un confronto di queste proporzioni a differenti energie dei K− mostra un esaltamento della produzione diretta di Λ0.
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Bhowmik, B., Goyal, D.P., Jain, P.C. et al. Interactions of negative K-mesons in nuclear emulsion at energies (0÷180) MeV. Nuovo Cim 31, 716–728 (1964). https://doi.org/10.1007/BF02733789
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DOI: https://doi.org/10.1007/BF02733789