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In the distribution of rapidity gaps between charged particles produced at 100-400 GeV/c, we find direct evidence for the independent production of clusters with density approximately one per unit of rapidity. This cluster-density measurement and the observed charged-particle density imply that the mean number of charged particles per cluster is about two. Implications of these numbers and techniques for refining them are discussed.
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Quigg et al. (1975) studied this question.
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