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Il Nuovo Cimento (1955-1965)

, Volume 20, Issue 2, pp 225–236 | Cite as

The determination of the sign of the asymmetry parameter in λ0 decay from the scattering of the decay proton

  • T. Bowen
  • C. R. Sun
  • A. E. Werbrouck
Article

Summary

A statistical method is presented whereby the information provided by a small number of nuclear scatters of λ0 decay protons can be used to determine the sign of the asymmetry parameter due to parity non-conservation in λ0 decay. As an example, the analysis is applied to twenty-one proton scatters of λ0 hyperons decaying in the Princeton multiplate cloud chamber. Because the asymmetry to be expected in each observed nuclear scatter is small, our data do not yield a statistically significant result. However, if each experimenter would follow a similar procedure with his data, it should be possible to combine results to determine the sign with a high degree of certainty.

Riassunto

Presentiamo un metodo statistico mediante il quale le informazioni fornite da un piccolo numero di scattering nucleari dei protoni di decadimento del λ0 possono essere usate per determinate il segno del parametre di asimmetria dovuto alla non-conservazione della parità nei decadimenti del λ0. Come esempio, applichiamo questa analisi a 21 scattering di protoni da iperoni λ0 decaduti nella camera a nebbia a molte piastre di Princeton. Poichè l’asimmetria che si puÒ attendere in ogni scattering nucleare osservato è piccola, i nostri dati non forniscono un risultato statisticamente significativo. Tuttavia, se ogni ricercatore seguisse una analoga procedura con i propri dati, sarebbe possibile combinare i risultati in modo da determinare il segno con un alto grado di certezza.

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Copyright information

© Società Italiana di Fisica 1961

Authors and Affiliations

  • T. Bowen
    • 1
  • C. R. Sun
    • 1
  • A. E. Werbrouck
    • 1
    • 2
  1. 1.Princeton UniversityPrinceton
  2. 2.Istituto di FisicaTorinoItalia

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