Direct Observation of Sequential Weak Decay of a Double Hypernucleus

PROGRESS OF THEORETICAL PHYSICS(1991)

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Abstract
We have studied stars in nuclear emulsion due to the capture at rest of the KELVIN- hyperons produced in the (K-,K+) reaction. The sequential weak decay of a double hypernucleus (nucleus with S = -2) has been directly observed. The double hypernucleus is assigned as either LAMBDA-LAMBDA-Be-10 or LAMBDA-LAMBDA-B-13. This assignment excludes the existence of the H dibaryon lighter than 2203.7 +/- O.7 MeV/c2.
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sequential weak decay
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