Elsevier

Nuclear Physics B

Volume 129, Issue 3, 24 October 1977, Pages 365-389
Nuclear Physics B

Charged particle multiplicity distributions in pp collisions at ISR energies

https://doi.org/10.1016/0550-3213(77)90122-5Get rights and content

Abstract

We present the first direct measurements of charged-particle multiplicity distributions for pp collisions at ISR energies. The measurements are performed by means of a streamer chamber detector with large solid-angle coverage and excellent multitrack efficiency. Particle densities are observed to rise in the central region as s increases. The multiplicity distributions in this region deviate from a Poisson Law, thus giving evidence for correlations. These correlations are of the same type as those obtained from clustering of the collision products. The mean charged multiplicity over the full rapidity range increases faster than log s. Our data do not support an early onset of KNO multiplicity scaling.

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  • Now at DESY, Hamburg, Germany.

    Now at Princeton University, Princeton, New Jersey, USA.

    ★★

    Nowa at CEN Scalay, Gif-sur-Yvette, France.

    ★★★

    Now at Lab. Nazional di Frascati, Roma, Italy.

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