Search for the H-dibaryon as a ΛΛ resonance

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3 Citations (Scopus)


The discovery of pentaquark baryons has attracted new attention to the search for the six-quark (hexaquark) object. Since the observation of double-Λ hypernuclei, the hypothesized H-dibaryon can no longer exist below the ΛΛ mass by more than a few MeV. Enhanced ΛΛ production near threshold, which has been reconfirmed by two other experiments, was first observed in 12C(K-,K +)ΛΛX reactions at KEK-PS and reflects the possible existence of a ΛΛ resonance, which is referred to as an H-dibaryon resonance state. The present study of ΛΛ enhancement near threshold has been performed to study the spin of the parent particle decaying into ΛΛ. It should be noted that the ΛΛ resonance(s) below 2.261 GeV/c2 is likely to be a spin 0 state.

Original languageEnglish
Pages (from-to)323-328
Number of pages6
JournalJournal of the Korean Physical Society
Issue number2
Publication statusPublished - 2004 Aug
Externally publishedYes


  • H-dibaryon
  • Hexaquark
  • KEK-PS
  • ΛΛ resonance

ASJC Scopus subject areas

  • General Physics and Astronomy


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