### Abstract

L3 preliminary data of two-particle Bose-Einstein correlations are reported for hadronic Z^{0} 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 language | English |
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Pages (from-to) | 208-214 |

Number of pages | 7 |

Journal | Nonlinear Phenomena in Complex Systems |

Volume | 13 |

Issue number | 2 |

Publication status | Published - Dec 1 2010 |

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### Keywords

- 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

### Cite this

^{0}decays at LEP.

*Nonlinear Phenomena in Complex Systems*,

*13*(2), 208-214.