Summary
In a systematic search for rare hypernuclear species in nuclear emulsion exposed to 3.0 GeV/c K−-mesons at the CERN PS, an event with three connecting stars has been observed. The two secondary stars are most probably due to the decay of a cascade hypernucleus according to the following channel: \(_\Xi ^{13} - C \to {}_\Lambda ^8 Be + {}_\Lambda ^5 He + Q\). The binding energy of the ÷-hypernucleus is \(B_{\Xi - } \left( {_{\Xi - }^{13} C} \right) - \left( {18.1 \pm 3.2} \right)\) MeV.
Riassunto
In una ricerca sistematica di specie ipernucleari rare in emulsioni nucleari esposte a mesoni K− di 3.0 GeV/c al CERN PS, si è osservato un evento con tre stelle di collegamento. Le due stelle secondarie sono molto probabilmente dovute all'ipernucleo di decadimento in accordo al seguente canale: \(_\Xi ^{13} - C \to {}_\Lambda ^8 Be + {}_\Lambda ^5 He + Q\). L'energia di legame per l'ipernucleo ÷ è\(B_{\Xi - } \left( {_{\Xi - }^{13} C} \right) - \left( {18.1 \pm 3.2} \right)\) MeV.
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Mondal, A.S., Basak, A.K., Kasim, M.M. et al. The identification of a cascade hypernucleus. Nuov Cim A 54, 333–339 (1979). https://doi.org/10.1007/BF02770008
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DOI: https://doi.org/10.1007/BF02770008