Summary
The results of a cosmic-ray experiment on the production of neutral V-partioles in copper and carbon are given. The conclusions are based on the analysis of 51 Λ°-events from copper and 28 from carbon. The ratio of number of λ°-particles to number of short-lived θ°-particles at production is found to be ∼1: 1 in copper and ∼ 1: .2 in carbon before allowance is made for the decay modes involving only neutral particles. The momentum spectra found for the V°-particles agree with earlier results. A possible asymmetry in the decay of Λ°-particles is discussed and estimates of the mean lifetimes of Λ° and θ 01 -particles are given.
Riassunto
È stata studiata la produzione di particelle V neutre in interazioni nucleari di raggi cosmici con rame e carbonic Le conchisioni sono basate suU’analisi di 51 V° da rame e 28 da carbonio. Il rapporto, non corretto per decadimenti neutri, tra il numero di particelle Λ ° e quello delle particelle θ°, a breve vita media, risulta essere alia produzione: 1/1 per gli eventi da rame e 1/2 per quelli da carbonio. Gli spettri dei momenti trovati per le V° sono in accordo con precedenti determinazioni. Si discute la possibilità dell’esistenza di una asimmetria nel decadimento delle particelle Λ° e vengono dati i valori delle vite medie per le Λ0 e θ 01 .
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A part of the contents of this paper was presented at theInternational Conference on Mesons and Recently Discovered Particles, Padua-Venice (September 1957).
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Cooper, W.A., Filthuth, H., Montanet, L. et al. Neutral V-particle from copper and carbon. Nuovo Cim 8, 471–481 (1958). https://doi.org/10.1007/BF02828755
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DOI: https://doi.org/10.1007/BF02828755