Bose-Einstein correlations

The effect of Bose-Einstein correlations on multiplicity distributions of i dentical pions is discussed. It is found that these correlations affect sig nificantly the observed multiplcity distributions, but Einstein's condensat ion is unlikely to be achieved, unless "cold spots", i.e. regions, where gr oups of pions with very small relative momenta are produced, occur in high energy heavy-ion collisions.