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Observation of a Be double-Lambda hypernucleus in the J-PARC E07 experiment
- A double-Λ hypernucleus, ΛΛBe, was observed by the J-PARC E07 Collaboration in nuclear emulsions tagged by the (K−,K+) reaction. This event was interpreted as the production and decay of 10ΛΛBe, 11ΛΛBe, or 12ΛΛBe∗ via Ξ− capture in 16O. By assuming capture in the atomic 3D state, the binding energies of two Λ hyperons (BΛΛ) of these double-Λ hypernuclei are obtained to be 15.05±0.11MeV, 19.07±0.11MeV, and 13.68±0.11MeV, respectively. Based on the kinematic fitting, 11ΛΛBe is the most likely explanation for the observed event.
Khin Than Tint, et.al
- Progress of Theoretical and Experimental Physics