Title: Moments of the charged-particle multiplicity distribution in Z
       decays at LEP
       
 The $H_q$ moments derived from the
  charged-particle multiplicity distribution are known to exhibit 
  quasi-oscillations when plotted versus the order of the moment.
  This behaviour is predicted by the NNLLA of perturbative QCD
  for the parton level and, under the assumption of LPHD, also for the
  hadron level. Using the jet multiplicity distributions, obtained from
  the Cambridge jet algorithm, in order to vary the dependence on the
  LPHD hypothesis, we find that at our energy the oscillations
  only appear for non-perturbative scales. Since the weak b-decay is known
  to distort the multiplicity distribution and NNLLA is based on massless
  quarks, the analysis is repeated for both tagged light-quark
  and b-quark samples.
  In addition, the mean and other low-order moments of the multiplicity
  distribution have been measured.


Parallel session #PA 2,3
Plenary session #Pl 12,11

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