Study of Reaction K+p→Λ+η near Threshold

Yuichi Kubota, Sukeyasu S. Yamamoto, David C. Rahm

Research output: Contribution to journalArticlepeer-review


The cross section for the reaction K+p→Λ+η was measured as a function of the incident K momentum in the vicinity of the reaction threshold. The excitation function for this reaction including earlier data confirms the existence of Λ (1670) with a mass and width of 1668 MeV/c2 and 15 MeV/c2 decaying into Λη with xe1xΛη=0.040. In addition, the behavior of the excitation function as well as the Λ angular distributions and polarization strongly suggest the existence of Λ (1690) with a mass and width of 1680 MeV/c2 and 10 MeV/c2 decaying into Λη with xe1xΛη=0.025.

Original languageEnglish (US)
Pages (from-to)735-740
Number of pages6
JournalJournal of the Physical Society of Japan
Issue number3
StatePublished - 1977


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