Detailed L3 measurements of bose-einstein correlations and a region of anti-correlations in hadronic Z0 decays at LEP

T. Csörgõ, W. Metzger, W. Kittel, T. Novák

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L3 preliminary data of two-particle Bose-Einstein correlations are reported for hadronic Z0 decays in e+e-annihilation at LEP. The invariant relative momentum Q is identified as the eigenvariable of the measured correlation function. Significant anti-correlations are observed in the Bose-Einstein correlation function in a broad region of 0.5 - 1.6 GeV with a minimum at Q ≈ 0.8 GeV. Absence of Bose-Einstein correlations is demonstrated in the region above Q≥1.6 GeV. The effective source size is found to decrease with increasing value of the transverse mass of the pair, similarly to hadron-hadron and heavy ion reactions. These features and our data are described well by the non-thermal τ-model, which is based on strong space-time momentum-correlations.

Original languageEnglish
Pages (from-to)208-214
Number of pages7
JournalNonlinear Phenomena in Complex Systems
Issue number2
Publication statusPublished - Dec 1 2010



  • Bose-einstein correlations
  • Ee annihilation
  • Femtoscopic correlations
  • Hadronic Z decays
  • Single particle spectra
  • Source function reconstruction

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Mathematical Physics

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