Measurements are presented of short range three-particle correlations in
e(+)e(-) annihilations at LEP using data collected by the DELPHI
detector. At small values of the four-momentum difference, strong
three-particle correlations are observed for like-sign (+++ and —) and
for unlike-sign (++- and +–) pion combinations which are not a
consequence of two-particle correlations. A possible explanation of the
observed effects in like-sign combinations is the existence of higher
order Bose-Einstein interference, which significantly changes the
particle distributions in jets
