Production of 4ΛΛH hypernuclei

J. K. Ahn, S. Ajimura, H. Akikawa, B. Bassalleck, A. Berdoz, D. Carman, R. E. Chrien, C. A. Davis, P. Eugenio, H. Fischer, G. B. Franklin, J. Franz, T. Fukuda, L. Gan, H. Hotchi, A. Ichikawa, K. Imai, S. H. Kahana, P. Khaustov, T. KishimotoP. Koran, H. Kohri, A. Kourepin, K. Kubota, M. Landry, M. May, C. Meyer, Z. Meziani, S. Minami, T. Miyachi, T. Nagae, J. Nakano, H. Outa, K. Paschke, P. Pile, M. Prokhabatilov, B. P. Quinn, V. Rasin, A. Rusek, H. Schmitt, R. A. Schumacher, M. Sekimoto, K. Shileev, Y. Shimizu, R. Sutter, T. Tamagawa, L. Tang, K. Tanida, K. Yamamoto, L. Yuan

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3 Citations (Scopus)


An experiment demonstrating the production of double-Λ hypernuclei in reactions on 9Be was carried out at the D6 line in the BNL alternating-gradient synchrotron. The technique was the observation of pions produced in sequential mesonic weak decay, each pion associated with one unit of strangeness change. The results indicate the production of a significant number of the double hypernucleus 4ΛΛH and the twin hypernuclei 4ΛH and 3ΛH. The relevant decay chains are discussed and a simple model of the production mechanism is presented. An implication of this experiment is that the existence of an S = −2 dibaryon more than a few MeV below the Λ Λ mass is unlikely.

Original languageEnglish
Pages (from-to)132504-1-132504-4
JournalPhysical review letters
Issue number13
Publication statusPublished - 2001 Sept 24
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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