LXI. On the mass of the Λ0-particle

Friedlander, M. W. ; Keefe, D. ; Menon, M. G. K. ; Merlin, M. (1954) LXI. On the mass of the Λ0-particle Philosophical Magazine, 45 (364). 533 - 542. ISSN 1478-6435

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Related URL: http://dx.doi.org/10.1080/14786440508521100


In a stack of stripped photographic emulsions, twenty events of type 2+0n have been observed, in each of which the outgoing particles are a proton and a negative π-meson respectively; the latter particle was identified by the characteristic star it produced when brought to rest in the emulsion. Assuming that each of these events represents the decay in flight of a neutral hyperon according to the scheme Λ0→π-+P+Q, values of the energy release Q have been calculated. In eleven of the events the proton could be traced to the end of its range; the energies of both particles could then be deduced using appropriate range-energy relations. In the remaining nine examples, the energy of the proton was deduced from grain density considerations and was accordingly less well determined.

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