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Il Nuovo Cimento (1955-1965)

, Volume 12, Issue 3, pp 241–263 | Cite as

The interactions of positive K-mesons with nuclei in photographic emulsion at energies in the region (240÷300) MeV

  • D. Keefe
  • A. Kernan
  • A. Montwill
  • M. Grilli
  • L. Guerriero
  • G. A. Salandin
Article

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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Copyright information

© Società Italiana di Fisica 1959

Authors and Affiliations

  • D. Keefe
    • 1
  • A. Kernan
    • 1
  • A. Montwill
    • 1
  • M. Grilli
    • 2
    • 3
  • L. Guerriero
    • 2
    • 3
  • G. A. Salandin
    • 2
    • 3
  1. 1.University CollegeDublin
  2. 2.Istituto di Fisica dell’UniversitàPadova
  3. 3.Sezione di PadovaIstituto Nationale di Fisica NucleareItalia

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