Multiplicity fluctuations in the string clustering approach
  We present our results on multiplicity fluctuations in the framework of the string clustering approach. We compare our results --with and without clustering formation-- with CERN SPS NA49 data. We find a non-monotonic behaviour of these fluctuations as a function of the collision centrality, which has the same origin as the observed fluctuations of transverse momentum: the correlations between the produced particles due to the cluster formation. 
L. Cunqueiro, E. G. Ferreiro, F. del Moral and C. Pajares