Summary
The identification of V0 decays, starting from the now establishedQ-values for the Λ0 and θ0-particles, is discussed. A method of separating Λ0 and θ0-particles is described; it demands measurements only of the negative secondary momentum and of the angle between the secondary tracks. Curves are given which facilitate calculations ofQ-values. Since, if the errors of measurement are large, standard errors inQ are unreliable, curves are given by means of which the compatibility of any given event with Λ0 and θ0-decay may be checked. The effect of instrumental and selection bias on the interpretation of anomalous Vo decays is considered.
Riassunto
Si discute l’identificazione dei decadimenti V0 a partire dai valori ora stabiliti deiQ per le particelle Λ0 e θ0. Si descrive un metodo per la separazione delle particelle Λ0 e θ0, che richiede solo misure dell’impulso del secondario negativo e dell’angolo fra le tracce dei secondari. Si danno curve che facilitano il calcolo dei valori diQ. Poichè, se gli errori di misura sono grandi, gli errori «standard» nei valori diQ non sono attendibili, si danno curve per mezzo delle quali è possibile verificare se i singoli eventi possono interpretarsi come decadimenti Λ0 e θ0. Riguardo ai decadimenti V0 anomali, si tiene conto dell’influenza delle deviazioni strumentali ed ai criteri usati nella selezione degli eventi.
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Astbury, J.P. The analysis of V0 decays when the errors of measurement are large. Nuovo Cim 12, 387–406 (1954). https://doi.org/10.1007/BF02790735
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DOI: https://doi.org/10.1007/BF02790735