A new treatment of Bose-Einstein correlations is incorporated in a space-time parton-shower model for $e^{+}{e}^{-}$ annihilation into hadrons. Two alternative algorithms are discussed, and we use a simple calculable model to demonstrate that they reproduce successfully the size of the hadron emission region. One of the algorithms is used to calculate two-pion correlations in $e^{+}{e}^{-}\to Z^0\to \mathrm{hadrons}$ and $e^{+}{e}^{-}\to W^{+}{W}^{-}\to \mathrm{hadrons}.$ Results are shown with and without resonance decays, for correlations along and transverse to the thrust jet axis in these two classes of events.

• Received 19 November 1998

DOI:https://doi.org/10.1103/PhysRevD.61.054002