First measurement of the OMEGA$^{-}$ decay branching ratios

In an experiment in the CERN-SPS charged-hyperon beam, the main Omega /sup -/ decay branching ratios have been measured to be Gamma ( Omega /sup -/ to Lambda K/sup -/)/ Gamma (all)=0.686+or-0.013, Gamma ( Omega /sup -/ to Xi /sup 0/ pi /sup -/)/ Gamma (all) =0.234+or-0.013, Gamma ( Omega /sup -/ to...

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Detalles Bibliográficos
Autores principales: Bourquin, Maurice, Brown, R M, Chatelus, Y, Chollet, J C, Degré, A, Froidevaux, Daniel, Fyfe, A R, Gaillard, Jean-Marc, Gee, C N P, Gibson, W M, Igo-Kemenes, P, Jeffreys, P W, Merkel, B, Morand, R, Plothow-Besch, Hartmute, Repellin, J P, Saunders, B J, Sauvage, G, Schiby, B, Siebert, Hans-Wolfgang, Smith, V J, Streit, K P, Strub, R, Thresher, J J, Tovey, Stuart N
Lenguaje:eng
Publicado: 1979
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1016/0370-2693(79)90144-8
http://cds.cern.ch/record/133377
Descripción
Sumario:In an experiment in the CERN-SPS charged-hyperon beam, the main Omega /sup -/ decay branching ratios have been measured to be Gamma ( Omega /sup -/ to Lambda K/sup -/)/ Gamma (all)=0.686+or-0.013, Gamma ( Omega /sup -/ to Xi /sup 0/ pi /sup -/)/ Gamma (all) =0.234+or-0.013, Gamma ( Omega /sup -/ to Xi /sup -/ pi /sup 0/)/ Gamma (all)=0.080+or-0.008. The relative branching ratio of the two Xi pi modes provides a test of the Delta I=1/2 rule in decuplet-octet transitions. A search has also been made for the rare decay modes Omega /sup -/ to Lambda pi /sup -/, Omega /sup -/ to Xi /sup -/ gamma , Omega /sup -/ to Xi /sup -/ pi /sup +/ pi /sup -/ and Omega /sup -/ to Xi /sup 0/e/sup -/ nu . (6 refs).

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