Direct experimental evidence of the weak $\Lambda np\to nnp$ hypernucleus decay

Abstract

A direct experimental evidence of the occurrence of the weak reaction $\Lambda np\to nnp$ in nuclei has been obtained by the FINUDA experiment. Three events have been found that can be attributed to ${}_{\Lambda }^7$Li and ${}_{\Lambda }^9$Be two nucleon-induced non mesonic weak decays. The kinematic analysis of such events is presented here.

arXiv commentthe paper has been published by Nuclear Physics A with major modifications and with a different title