A measurement of the lifetimes of Xi /sup 0/ and Lambda hyperons

The mean lifetimes of the Lambda and Xi /sup 0/ hyperons have been measured in a short neutral beam at the CERN Proton Synchrotron. Lambda and Xi /sup 0/ decays have been identified by measuring their decay products in a magnetic spectrometer and in a lead glass hodoscope. The experimental results,...

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Detalles Bibliográficos
Autores principales: Zech, G, Dydak, F, Geweniger, C, Kleinknecht, K, Navarria, Francesco Luigi, Overseth, O E, Steffen, P, Taureg, H, Wahl, H, Williams, E G H
Lenguaje:eng
Publicado: 1977
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1016/0550-3213(77)90414-X
http://cds.cern.ch/record/878580
Descripción
Sumario:The mean lifetimes of the Lambda and Xi /sup 0/ hyperons have been measured in a short neutral beam at the CERN Proton Synchrotron. Lambda and Xi /sup 0/ decays have been identified by measuring their decay products in a magnetic spectrometer and in a lead glass hodoscope. The experimental results, based on 53000 Lambda decays and 6300 Xi /sup 0/ decays, are tau /sub Lambda /=(2.69+or-0.03)*10/sup -10/ s, tau /sub Xi /0=(2.77+or-0.16)*10/sup -10/ s-( tau /sub Lambda /-2.69*10/sup -10/ s). From the result for tau /sub Xi /0 together with existing data on tau /sub Xi /- a violation is obtained of the Delta I=/sup 1///sub 2/ rule in non-leptonic Xi decays. (11 refs).

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