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Il Nuovo Cimento (1955-1965)

, Volume 10, Issue 2, pp 359–364 | Cite as

On the polarization of electrons from the decay of muons

  • L. B. Okun
  • V. M. Šehter
Article

Summary

An expression for the energy spectrum, angular distribution and polarization of electrons emitted by decaying muons has been obtained (formula (2) in the Appendix). The calculations are carried out for a decay interaction Hamiltonian of the most general form characterized by ten complex constants (formula (1) in the Appendix). Results, obtained previously by different authors (9–21), are contained in formula (2). It is shown that experiments performed up to the present time are not sufficient for the verification of the predictions made in references (4,5). According to these references, conditions (2) and (3) must be fullfilled; the distribution of electrons must be described by the formula (4). It follows from (2) that a combination ofS, T andP couplings gives formula (5), which differs only by the sign from (4). Hence to decide which of these two formulas is the correct one, the polarization sign of the decaying muons must be measured.

Riassunto

Si è ottenuta (formula (2) dell’appendice) un’espressione per lo spettro d’energia, la distribuzione angolare e la polarizzazione degli elettroni emessi nel decadimento dei muoni. Si sono eseguiti i calcoli per un’Hamiltoniana dell’interazione di decadimento di forma generica caratterizzata da dieci costanti eomplesse (formula (1) dell’Appendice). I risultati ottenuti precedentemente da differenti autori (9–21) sono contenuti nella formula (2). Si dimostra che le esperienze eseguite finora non sono sufficienti per la verifica delle previsioni fatte nei lavori (4,5). Secondo questi lavori, debbono verificarsi le condizioni (2) e (3); la distribuzione degli elettroni deve essere descritta dà la (4). Segue da (2) che una combinazione di accoppiamentiS, T eP dà la (5), che differisce dalla (4) solo per il segno. Pertanto, per decidere quale delle due espressioni è corretta si deve misurare la polarizzazione dei muoni che decadono.

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Copyright information

© Società Italiana di Fisica 1958

Authors and Affiliations

  • L. B. Okun
    • 1
  • V. M. Šehter
    • 1
  1. 1.Academy of SciencesMoscow

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