H-dibaryon search via {Xi}{sup -} capture on the deuteron
Journal Article
·
· Physical Review C
- and others
A search for the H dibaryon has been conducted at the Brookhaven National Laboratory AGS, using a 1.8 GeV/c K{sup -} beam. {Xi}{sup -} hyperons were produced in a liquid-hydrogen target via the reaction K{sup -}+p{yields}K{sup +}+{Xi}{sup -}. The hyperons were slowed in degraders and those most likely to stop in an adjacent liquid-deuterium target were tagged by silicon detectors. Monoenergetic neutrons were sought as the signature for H formation in ({Xi}{sup -},d){sub atom}{yields}H+n. The experiment was designed for optimal sensitivity to a loosely-bound H, complementing recent (K{sup -},K{sup +}) measurements on nuclear targets. In addition, the experiment's sensitivity was independent of lifetime and of decay modes of the H. No statistically significant evidence for H formation was seen. Upper limits on the branching ratio for H formation in the above reaction have been set in a mass range extending from slightly above {Lambda}{Lambda} threshold to {approx}100 MeV of binding and are compared with a corresponding theoretical prediction.
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40206158
- Journal Information:
- Physical Review C, Journal Name: Physical Review C Journal Issue: 3 Vol. 63; ISSN 0556-2813
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
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