Effects of FSI, CR and BEC at Small Relative Momenta of Particles and W-mass Systematics at LEP

Abstract

The effects of Final State Interactions(FSI), Colour Reconnection(CR) and Bose--Einstein Correlations(BEC) at small relative momenta of particles are discussed. The short review of the LEP results on BEC at Z-peak, on BEC between particles from different Ws in $e^{+}{e}^{-}\to W^{+}{W}^{-}$ events, and the W-mass systematics due to BEC is given

arXiv comment4 pages, LaTeX, with 1 fig. Presented at 32st International Symposium on Multiparticle Dynamics (ISMD 2002), Alushta, Ukraine, 7-13 Sep 2002