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

Delaere, Christophe;Lemaitre, Vincent;et.al.
(2004) European Physical Journal C — Vol. 36, n° 2, p. 147-159 (2004)

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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(T), and longitudinal, Q(L), components with respect to the longitudinal centre-of-mass system. Values for the correlation radii, R-T and R-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.
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Delaere, C., Lemaitre, V., & et al. (2004). Two-dimensional analysis of Bose-Einstein correlations in hadronic Z decays at LEP. European Physical Journal C, 36(2), 147-159. https://doi.org/10.1140/epjc/s2004-01884-3 (Original work published 2004)