W-MASS RECONSTRUCTION FROM HADRONIC EVENTS IN LEP2 - BOSE-EINSTEIN EFFECT

We discuss several aspects of the W-pair production and decay into qua rks, taking hadronization into account. We touch upon the influence of the so-called Bose-Einstein effect and colour reconnection on the rec onstructed mass of the W boson. The initial-state radiation effect is also revisited. The numerical studies are done using the KORALW Monte Carlo event generator. We find that the Bose-Einstein effect, which we implement using the ''weighting method'', has a negligible influence, below 30 MeV, on the reconstruction of the W mass.