Summary
An interpretation of the data on the capture of Σ--particles by nuclei of photoemulsion has been attempted on the basis of the independent particle model. In particular it has been found that the probability of the A-particle produced in the capture to remain trapped in the nucleus, and hence the average size of the Σ- capture star, strongly depends on the mean free path of Λ-particles in nuclear matter. In order to justify the experimental data the Λ-N elastic cross-section at energies around 50 MeV should be about 15 mb.
Riassunto
Sulla base del modello a partioelle indipendenti abbiamo oeroato di interpretare i dati sperimentali sulla cattura di particelle Σ- dai nuclei di emulsione fotograflica. È risultato tra l’altro che la probabilità che le partieeile Λ prodotte nella cattura rimangano nel nucleo, e quindi la dimensione media delle stelle di cattura dei Σ-, dipende fortemente dal cammino libero medio delle particelle Λ in materia nucleare. Allo scopo di render conto dei dati sperimentali è opportuno assumere per la sezione di urto elastica Λ-nucleone, ad energie intorno ai 50 MeV, un valore di circa 15 mb.
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Biswas, N.N., Ceccarelli, M. On the Σ capture and the Λ-nucleon cross-section. Nuovo Cim 8, 599–606 (1958). https://doi.org/10.1007/BF02828774
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DOI: https://doi.org/10.1007/BF02828774