Photoproduction of Λ(1405) on the Proton and Nuclei

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Abstract

The nature of Λ(1405) hyperon is still controversial as either an unstable K̄N bound state or L = 1 SU(3)-singlet three quark state coupled with the S-wave K̄N channels. Recent theoretical works predicted that the lineshape would be different for different charge combinations of the πΣ decay channels in the context of chiral dynamics plus final-state interaction. We have measured the lineshape of Λ(1405) for charged πΣ channels through p(γ, K+π)Σ reaction at 1.5-2,4 GeV. The observed lineshapes for π-Σ- and π+Σ- channels turn out to be different, which implies that Λ(1405) could be interpreted as a bound-state of meson-baryon states.

Original languageEnglish
Pages (from-to)S14-S19
JournalJournal of the Korean Physical Society
Volume43
Issue numberSUPPL.
Publication statusPublished - 2003 Sep 1

Keywords

  • Photoproduction
  • SPring-8
  • Time projection chamber
  • Λ(1405)

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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