Multiplicity, Jet, and Transverse Mass dependence of Bose-Einstein Correlations in e${}^{+}$e${}^{-}$- Annihilation

Bose-Einstein correlations of pairs of identical charged pions produced in hadronic Z decays are analyzed for both two- and three-jet events. A parametrization suggested by the tau-model is used to investigate the dependence of the Bose-Einstein correlation function on track multiplicity, number of jets, and transverse momentum.