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Il Nuovo Cimento (1955-1965)

, Volume 10, Issue 3, pp 435–451 | Cite as

Detailed studies of an event involving the multiple production of strange particles

  • Tsai-Chü
Article

Summary

Three strange particles are emitted from a cosmic ray star of the type 14 + 5p found in the Sardinia stack S36. They are: 1) a negative hyperon captured at rest; 2) a positive hyperon decaying in flight and 3) a negative K-meson interacting in flight. Detailed measurements of each particle are given in this study. The three strange particles are coplanar. Each has the same strangeness number. Evidently, there are three pairs of strange particles emitted in this interaction. But, if the negative hyperon were an anti-hyperon, then two pairs should be emitted. It seems very probable that the strange particles are produced through a multiple rather than a plural process. In conclusion, this paper gives a rough estimate of the frequency ratio between multiple production events and all associated events involving two or more identified strange particles. The ratio is of the order 0.02 to 0.07 for two-nucleon interactions in the energy range of about 15 GeV.

Riassunto

Tre particelle strane sono emesse da una stella del tipo 14 + 5p trovata nel Sardinia stack S36. Sono: 1) un iperone negativo catturato a riposo; 2) un iperone positivo che decade in volo e 3) un mesone K negativo che interagisce in volo. Nel presente studio si danno misurazioni dettagliate di ognuna di tali particelle. Le tre particelle strane sono coplanari. Ognuna ha lo stesso numero di stranezza. Evidentemente in questa interazione sono emesse tre coppie di particelle strane. Ma, se l’iperone negativo fosse un antiiperone le coppie emesse dovrebbero essere due. Sembra molto probabile che le particelle strane siano prodotte tramite un processo multiplo anzichè plurimo. In conclusione il presente lavoro dà un valore di massima del rapporto di frequenza tra eventi da produzione multipla e tutti gli eventi associati interessanti due o più particelle strane identificate. Il rapporto è dell’ordine di 0.02 a 0.07 per interazioni fra due nucleoni nell’intervallo di energia di circa 15 MeV.

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Copyright information

© Società Italiana di Fisica 1958

Authors and Affiliations

  • Tsai-Chü
    • 1
  1. 1.Faculté des Sciences — SorbonneParis

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