Search for the neutron-rich hypernucleus 9{\Lambda}He
M. Agnello, L. Benussi, M. Bertani, H.C. Bhang, G. Bonomi, E. Botta,, M. Bregant, T. Bressani, S. Bufalino, L. Busso, D. Calvo, P. Camerini, B., Dalena, F. De Mori, G. D Erasmo, F.L. Fabbri, A. Feliciello, A. Filippi, E.M., Fiore, A. Fontana, H. Fujioka, P. Genova, P. Gianotti
TL;DR
This paper reports on the search for the neutron-rich hypernucleus 9ΛHe using the FINUDA experiment, setting an upper limit on its production rate through specific decay channels, contributing to understanding hypernuclear physics.
Contribution
First experimental search for 9ΛHe hypernucleus using pion pair detection at DAFNE, establishing an upper production rate limit.
Findings
Upper limit of 9ΛHe production rate: (2.3 +/- 1.9) x 10^-6 per K-stop
No definitive observation of 9ΛHe hypernucleus
Method demonstrates feasibility of hypernucleus search via pion coincidences
Abstract
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.
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