HADES collaboration (97 authors)Blanco, A.Fonte, P.Lopes, L.Mangiarotti, A.2019-02-032019-02-032013http://dx.doi.org/10.1140/epja/i2013-13146-0http://hdl.handle.net/10400.26/26489A high-statistic data sample of Ar(1.76 AGeV)+KCl events recorded with HADES is used to search for a hypertriton signal. An upper production limit per centrality-triggered event of $1.04$ x $10^{-3}$ on the $3\sigma$ level is derived. Comparing this value with the number of successfully reconstructed $\Lambda$ hyperons allows to determine an upper limit on the ratio $N_{_{\Lambda}^3H}/N_{\Lambda}$, which is confronted with statistical and coalescence-type model calculations.engjournal article2019-02-03