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# Two-dimensional analysis of Bose-Einstein correlations in hadronic Z decays at LEP

Abstract : Bose-Einstein correlations are studied in pairs of charged pions from hadronic Z decays, collected by the ALEPH detector.The correlation function, measured using either the unlike-sign or the mixed reference sample, is studied in terms of the Lorentz-invariant four-momentum difference and its transverse, $Q_{\textrm{T}}$, and longitudinal, $Q_{\textrm{L}}$, components with respect to the longitudinal centre-of-mass system. Values for the correlation radii, $R_{\textrm{T}}$ and $R_{\textrm{L}}$, are obtained from the fit of the Goldhaber parametrisation.The results indicate that the correlation radii values depend on the chosen kind of reference sample and on the two-jet purity.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00021819
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Submitted on : Friday, September 10, 2004 - 1:51:27 PM
Last modification on : Thursday, December 16, 2021 - 2:10:22 PM
Long-term archiving on: : Wednesday, March 31, 2010 - 2:25:50 PM

### Identifiers

• HAL Id : in2p3-00021819, version 1

### Citation

A. Heister, S. Schael, R. Barate, R. Bruneliere, I. de Bonis, et al.. Two-dimensional analysis of Bose-Einstein correlations in hadronic Z decays at LEP. European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2004, 36, pp.147-159. ⟨in2p3-00021819⟩

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