Abstract
An attempt at the direct observation of the cascade decay of beauty particles, produced by π − of 350 GeV/ c leading to 3 muons or 4 muons in the final state, has been made in an emulsion/counter hybrid experiment at CERN. Under the assumption that the lifetime of beauty particles is of the order of 10 −13s the non-observation of any candidates provides an upper limit for beauty production of ∼90 nb at the 90% confidence level.
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