Multiplicity, transverse momentum, forward-backward long range correlations and percolation of strings

Abstract

The behaviour of the normalized variance of the multiplictiy distribution and the normalized transverse momentum fluctuations with centrality is naturally explained by the dependence on centrality of the number of clusters of color sources. This dependence predicts a nonmonotonic behaviour with centrality of the multiplicity associated to high p T events. The clustering of color sources is also able to reproduce the increase with centrality of the forward-backward long-range correlations and its supression compared to superposition model predictions. The 2nd edition of the International Workshop-Correlations and Fluctuations in Relativistic Nuclear Collisions