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Sigma-antihyperon correlations in Z0 decay and investigation of the baryon production mechanism
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Sigma-antihyperon correlations in Z0 decay and investigation of the baryon production mechanism
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Data collected around sqrt{s}=91 GeV by the OPAL experiment at the LEP e+e- collider are used to study the mechanism of baryon formation. As the signature, the fraction of Sigma-hyperons whose baryon number is compensated by the production of a Sigma-, Lambda or Xi- antihyperon is determined. The method relies entirely on quantum number correlations of the baryons, and not rapidity correlations, making it more model independent than previous studies. The diquark fragmentation model without the popcorn mechanism is strongly disfavored with a significance of 3.8 standard deviations including systematic uncertainties. It is shown that previous studies of the popcorn mechanism are not conclusive if parameter uncertainties are considered.
Forward citations
Cited by 2 Pith papers
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Measurement of $\Xi^-/\bar{\Xi}^{+}$ production in jets from $Z$ boson decays with the DELPHI open data
First measurement of Xi-/Xi+ production in energy-ranked jets at LEP yields R_g/q = 1.21 ± 0.32, consistent with JETSET and previous strange-hadron results.
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Measurement of $\Xi^-/\bar{\Xi}^{+}$ production in jets from $Z$ boson decays with the DELPHI open data
The first measurement of the gluon-to-quark production ratio for Ξ−/Ξ+ baryons in Z decays gives R=1.21±0.18±0.26, consistent with JETSET and with unity.
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