Journal article

A study of parton fragmentation in hadronic Z° decays using ΛΛ̄ correlations

G Abbiendi, K Ackerstaff, G Alexander, J Allison, N Altekamp, KJ Anderson, S Anderson, S Arcelli, S Asai, SF Ashby, D Axen, G Azuelos, AH Ball, E Barberio, RJ Barlow, R Bartoldus, JR Batley, S Baumann, J Bechtluft, T Behnke Show all

European Physical Journal C | Published : 2000


The correlated production of Λ and Λ̄ baryons has been studied using 4.3 million multihadronic Z° decays recorded with the OPAL detector at LEP. Lambda pairs were investigated in the full data sample and for the first time also in 2-jet and 3-jet events selected with the k⊥ algorithm. The distributions of rapidity differences from correlated ΛΛ̄ pairs exhibit short-range, local correlations and prove to be a sensitive tool to test models, particularly for 2-jet events. The JETSET model describes the data best but some extra parameter tuning is needed to improve agreement with the experimental results in the rates and the rapidity spectra simultaneously. The recently developed modification of..

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