Search for double-Λ hypernuclei and the H-dibaryon in the (K-, K+) reaction on 12C

K. Yamamoto, D. E. Alburger, P. D. Barnes, B. Bassalleck, A. R. Berdoz, A. Biglan, T. Bürger, D. S. Carman, R. E. Chrien, C. A. Davis, H. Fischer, G. B. Franklin, J. Franz, L. Gan, A. Ichikawa, T. Iijima, K. Imai, P. Khaustov, Y. Kondo, P. KoranM. Landry, L. Lee, J. Lowe, R. Magahiz, M. May, R. McCrady, F. Merrill, C. A. Meyer, S. A. Page, K. Paschke, P. H. Pile, B. P. Quinn, W. D. Ramsay, A. Rusek, R. Sawafta, H. Schmitt, R. A. Schumacher, R. W. Stotzer, R. Sutter, F. Takeutchi, W. T.H. Van Oers, M. Yosoi, V. J. Zeps

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30 Citations (Scopus)

Abstract

A search for double-Λ hypernuclei ((ΛΛ)/12Be) and H-dibaryons using the 12C(K-, K+) reaction was performed at the BNL-AGS using a high-intensity 1.8 GeV/c K- beam. A missing-mass analysis below the end point of the quasi-free Ξ- production was used to investigate these S = -2 systems. The upper limit obtained for the forward-angle cross section of (ΛΛ)/12 Be production is 6 to 10 nb/sr. This is the first search for the direct production of double-Λ hypernuclei to reach the sensitivity required to observe the signal predicted by theoretical calculations. For the H-production cross section, we have obtained an upper limit in the range of a few nb/sr to 10 nb/sr for the H mass below 2100 MeV/c2. This upper limit is the most sensitive H search result to date for a tightly bound H. (C) 2000 Published by Elsevier Science B.V.

Original languageEnglish
Pages (from-to)401-407
Number of pages7
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume478
Issue number4
DOIs
Publication statusPublished - 2000 Apr 13
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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