Between the years 1992 and 1995 about 3.5 million hadronic Z decays were collected by the DELPHI detector at CERN. This data has been used to measure the production and lifetime of the beauty strange baryon Ξb,
in the inclusive decay channel Ξb →Ξ-ℓ- X.
The Ξ- baryon was reconstructed through the decay
Ξ- → Λ π-, using
a constrained fit method for cascade decays. An iterative
discriminant analysis was used for the Ξb selection.
A search for the Ξb baryon was also performed using
an alternative method of reconstructing the Ξ- baryon.
A measurement of the production of the charmed strange
baryon Ξc in the decay channel Ξc → Ξ-π+
using the same data is also presented.
The radiation monitoring system of the Silicon Microstrip Tracker
in the DØ detector is studied and used to estimate
the radiation dose received by the Silicon detector
during normal running conditions of the TeVatron accelerator.