Abstract
The mass of a doubly strange dibaryon called the H particle is calculated in lattice QCD on a 16/sup 3/ x 48 lattice with a renormalization-group--improved gauge action and Wilson's quark action. We find that the H is below the ..lambda lambda.. threshold for strong decay. Furthermore the case where the H is slightly below the NN threshold for weak decay is consistent with our numerical results and is not in conflict with the stability of the nuclei.
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