Strange baryon production in hadronic Z0 decays

The OPAL Collaboration

Research output: Contribution to journalArticlepeer-review

56 Scopus citations


The production of the JP = 1/2+ octet baryons Λ and Ξ-, the JP = 3/2+ decuplet baryons Σ(1385)±, Ξ(1530)0, and Ω-, and the JP = 3/2- orbitally excited state Λ(1520) has been measured in a sample of approximately 3.65 million hadronic Z0 decays. The integrated rates and the differential cross-sections as a function of xE, the scaled energy, are determined. The differential cross-sections of the Λ and Ξ- baryons are found to be softer than those predicted by both the JETSET and HERWIG Monte Carlo generators. The measured baryon yields are found to disagree with the simple diquark picture where only one tuning parameter for spin 1 diquarks is allowed. The yields are further compared with a thermodynamic model of hadron production which includes the production of orbitally excited mesons and baryons. The momentum spectra of Λ, Ξ-, Σ(1385)±, Ξ(1530)0, and Λ(1520) are also compared to the predictions of an analytical QCD formula.

Original languageEnglish
Pages (from-to)569-585
Number of pages17
JournalZeitschrift fur Physik C-Particles and Fields
Issue number4
StatePublished - 1 Mar 1997
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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