Summary
We have searched for events which could be attributed to the rare mode of decay Σ+→p+γ. These events in nuclear emulsion will give a proton of unique range 3045 µm. We have found four events consistent with this interpretation in a sample which contained 264 normal decays Σ+→p+π0. Taking into account background which could come from Σ− one-prong stars or decays in flight of very slow Σ+ in the normal way, we estimate the frequency of Σ+→p+γ to be about 1% that of Σ+→p+π0.
Riassunto
Abbiamo fatto ricerca di eventi che potessero essere attribuiti al raro modo di decadimento Σ+→p+γ. Questi eventi daranno in emulsioni nucleari un protone con un range unico di 3045 µm. Abbiamo trovato quattro eventi corrispondenti a questa interpretazione in un campione che conteneva 264 decadimenti normali Σ+→p+π0. Tenendo conto del fondo che può provenire da stelle Σ− ad un solo ramo o da normali decadimenti in volo di Σ+ molto lenti, stimiamo che la frequenza del decadimento Σ+→p+γ sia circa 1% di quella del Σ+→p+π0.
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Supported in part by the United States Atomic Energy Commission.
Part of this work was done while the author was a National Science Foundation Fellow at the University of Padova.
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Schneps, J., Kang, Y.W. Frequency of the decay mode Σ+→p+γ. Nuovo Cim 19, 1218–1220 (1961). https://doi.org/10.1007/BF02731397
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DOI: https://doi.org/10.1007/BF02731397