Search for the neutron-rich hypernucleus 9{\Lambda}He
  Search for the neutron-rich hypernucleus 9LHe is reported by the FINUDA experiment at DAFNE, INFN-LNF, studying (pi+, pi-) pairs in coincidence from the K-stop + 9Be --> 9LHe + pi+ production reaction followed by 9LHe --> 9Li + pi- weak decay. An upper limit of the production rate of 9LHe undergoing this two-body pi- decay is determined to be (2.3 +/- 1.9) 10-6/K-stop at 90% confidence level. 
M. Agnello, L. Benussi, M. Bertani, H.C. Bhang, G. Bonomi, E. Botta,   M. Bregant, T. Bressani, S. Bufalino, L. Busso, D. Ca...
nucl-ex