Summary
A special form of the theory ofLee andYang (1) is obtained by imposing an invariance principle, which insures that the mass as well as the magnetic moment (2) of the neutrino is identically zero. This invariance property leads to the conservation of a quantum numbern. The non-conservation of parity is discussed for the chain of decaysπ → μ+ν, μ → e+ν+ν. It is shown that the present theory contains as a special case the «screwon» theory recently proposed byLee andYang (3) and a similar theory proposed by Salam (4).
Riassunto
Si discute una proprietà di invarianza che garantisce che la massa ed il momento magnetico del neutrino sono identicamente zero. L’invarianza conduce ad una legge di conservazione che sostituisce la conservazione di parità. Si discute la teoria della catena di decadimenti π-μ-e mostrando che la teoria a due componenti, recentemente proposta daLee andYang, risulta come caso particolare.
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References
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This has been pointed out to the author by Prof.L. Radicati, see also ref. (4).
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Touschek, B.F. The mass of the neutrino and the non-conservation of parity. Nuovo Cim 5, 1281–1291 (1957). https://doi.org/10.1007/BF02731633
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DOI: https://doi.org/10.1007/BF02731633