Antihyperon and antiproton production in K+p interactions at 9 GeV/c

D. Lissauer, G. Alexander, A. Firestone, G. Goldhaber

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We have analyzed the reactions of the type K+p → YNN(π) in K+p interactions at 9 GeV/c, where Ȳ refers to a ∧ or Σ antihyperon. We have also studied the production of - in the reaction K+p → -YN(π) and of antiprotons in the reaction K+p → K+ppp. With twice data previously reported we observe again a low-mass enhancement in the ∧N final state and also observe some indications of a similar enhancement in the non-exotic Σ±N final states. This enhancement has the quantum numbers of an I = 1 2 K* resonance with mass M = 2240 +- 20 MeV and width L{cyrillic} = 80 ± 20 MeV.

Original languageEnglish
Pages (from-to)491-504
Number of pages14
JournalNuclear Physics, Section B
Issue number2
StatePublished - 1 May 1970
Externally publishedYes


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