Studies of Heavy Baryons in DELPHI and Radiation Monitoring in DØ

• 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-, usinga constrained fit method for cascade decays. An iterativediscriminant analysis was used for the Ξb selection.A search for the Ξb baryon was also performed usingan 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 detectorduring normal running conditions of the TeVatron accelerator.

Subject headings

NATURVETENSKAP  -- Fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences (hsv//eng)

Keyword

high energy physics

baryons

Physics

Fysik

Publication and Content Type

vet (subject category)

dok (subject category)