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Charged particle correlations inbar pp collisions at c.m. energies of 200, 546 and 900 GeV |
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| Authors: | R. E. Ansorge B. ?sman C. N. Booth L. Burow P. Carlson R. S. DeWolf B. Eckart G. Ekspong C. Fuglesang J. Gaudaen C. Geich-Gimbel B. Holl R. Hospes K. Jon-And D. P. Johnson F. Lotse N. Manthos D. J. Munday J. E. V. Ovens W. Pelzer J. G. Rushbrooke H. Schmickler F. Triantis L. Van Hamme C. Walck C. P. Ward D. R. Ward C. J. S. Webber T. O. White G. Wilquet N. Yamdagni UA Collaboration |
| Affiliation: | 1. Cavendish Laboratory, Department of Physics, University of Cambridge, CB3 0HE, Cambridge, UK 2. Institute of Physics, University of Stockholm, S-11346, Stockholm, Sweden 4. Physikalisches Institut der Universit?t, D-5300, Bonn, Germany 5. Inter-University Institute for High Energies (ULB-VUB), B-1050, Brussels, Belgium 3. CERN, CH-1211, Geneva 23, Switzerland |
| Abstract: | We present data on two-particle pseudorapidity and multiplicity correlations of charged particles for non single-diffractive (pbar p - collisions) at c.m. energies of 200, 546 and 900 GeV. Pseudorapidity correlations interpreted in terms of a cluster model, which has been motivated by this and other experiments, require on average about two charged particles per cluster. The decay width of the clusters in pseudorapidity is approximately independent of multiplicity and of c.m. energy. The investigations of correlations in terms of pseudorapidity gaps confirm the picture of cluster production. The strength of forward-backward multiplicity correlations increases linearly with ins and depends strongly on position and size of the pseudorapidity gap separating the forward and backward interval. All our correlation studies can be understood in terms of a cluster model in which clusters contain on average about two charged particles, i.e. are of similar magnitude to earlier estimates from the ISR. |
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