Summary
Measurements have been carried out on theπ-meson secondaries arising from the decay of positive π-mesons recorded in a stack of nuclear emulsions which had been exposed to the positive K-meson beam of the Berkeley « bevatron ». The distribution in energy of these secondaries is shown to be consistent with the view that the Τ-meson is a pseudo-scalar particle and they appear to exclude the possibility that the spin and parity of the particle are I-, 1+, 2+ or 3-.
Riassunto
Si sono eseguite misure sui mesoni π secondari originati dal decadimento dei mesoni Τ positivi scoperti in un pacco di emulsioni nucleari esposte al fascio di mesoni K positivi del bevatrone di Berkeley. Si mostra che la distribuzione dell’energia di questi secondari è quella corrispondente all’ipotesi che il mesone Τ sia una particella pseudoscalare e sembra escludere la possibilità che lo spin e la parità délia particella siano 1-, 1+, 2+ o 3-.
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References
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On leave from the University of Delhi.
On leave from the National Physical Laboratory, Pretoria.
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Bhowmik, B., Evans, D., van Heerden, I.J. et al. On the spin of artificially produced τ-mesons. Nuovo Cim 3, 574–585 (1956). https://doi.org/10.1007/BF02744429
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DOI: https://doi.org/10.1007/BF02744429