Summary
Interactions of K+-mesons with emulsion nuclei have been observed in a scan of 185 m of track. The analysis yielded, information on scattering reactions K+-p and K+-n and charge-exchange reactions. An energy dependence of the three cross-sections up to 350 MeV was obtained from the collected data of different laboratories working with emulsion technique. The phase-shift analysis in the 300 MeV region shows a contribution ofT=0 state of the same order of magnitude as that ofT=1 state. An interference seems to be present between theP-waves of the two states, depressing the K+-n scattering cross-section and raising the charge-exchange cross-section.
Riassunto
Sono state analizzate le interazioni relative a 185 m di traccia di mesoni K+ osservati in emulsione nucleare. Si sono ottenute informazioni sulle reazioni di scattering K+-p e K+-n e di cambio carica. Basandosi su tutti i dati in emulsione raccolti nei vari laboratori, si è determinata la dipendenza dell’energia delle 3 sezioni d’urto fino a 350 MeV. L’analisi in fasi mostra che verso i 300 MeV il contributo dello statoT=0 è dello stesso ordine di grandezza di quello dello statoT=1. All’interferenza tra ondeP di questi due stati si può attribuire l’aumento della sezione d’urto di cambio carica e la diminuzione della sezione d’urto di scattering su neutrone.
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Keefe, D., Kernan, A., Montwill, A. et al. The interactions of positive K-mesons with nuclei in photographic emulsion at energies in the region (240÷300) MeV. Nuovo Cim 12, 241–263 (1959). https://doi.org/10.1007/BF02745968
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DOI: https://doi.org/10.1007/BF02745968