Observation of a ${}_{\Lambda\Lambda}\mathrm{Be}$ double-$\Lambda$ hypernucleus in the J-PARC E07 experiment
H. Ekawa, K. Agari, J. K. Ahn, Takaya Akaishi et autres
A double-$\Lambda$ hypernucleus, ${}_{\Lambda\Lambda}\mathrm{Be}$, was observed by the J-PARC E07 collaboration in nuclear emulsions tagged by the $(K^{-},K^{+})$ reaction. This event was interpreted as a production and decay of $ {}_{\Lambda\Lambda}^{\;10}\mathrm{Be}$, ${}_{\Lambda\Lambda}^{\;11}\mathrm{Be}$, or ${}_{\Lambda\Lambda}^{\;12}\mathrm{Be}^{*}$ via $\Xi^{-}$ capture in ${}^{16}\mathrm{O}$. By assuming the …
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arXiv (Cornell University)