Charged particle multiplicity correlations in pp collisions at =0.3−1.8

The correlations between charged particle multiplicitie produced in forward and backward pseudorapidity regions in pp̄ interactions have been measured with a 240 element scintillator hodoscope. The correlation coefficient and the variance of the difference of multiplicities in the two pseudorapidity regions were deterermined for s=0.3−1.8 TeV. These results have been interpreted in terms of a cluster model of particle production.