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arXiv · 0912.0023

Charged-Particle Multiplicity in Proton-Proton Collisions

Jan Fiete Grosse-Oetringhaus·Klaus Reygers
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Abstract

This article summarizes and critically reviews measurements of charged-particle multiplicity distributions and pseudorapidity densities in p+p(pbar) collisions between sqrt(s) = 23.6 GeV and sqrt(s) = 1.8 TeV. Related theoretical concepts are briefly introduced. Moments of multiplicity distributions are presented as a function of sqrt(s). Feynman scaling, KNO scaling, as well as the description of multiplicity distributions with a single negative binomial distribution and with combinations of two or more negative binomial distributions are discussed. Moreover, similarities between the energy dependence of charged-particle multiplicities in p+p(pbar) and e+e- collisions are studied. Finally, various predictions for pseudorapidity densities, average multiplicities in full phase space, and multiplicity distributions of charged particles in p+p(pbar) collisions at the LHC energies of sqrt(s) = 7 TeV, 10 TeV, and 14 TeV are summarized and compared.

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Jan Fiete Grosse-Oetringhaus, Klaus Reygers. 2010-02-24. Charged-Particle Multiplicity in Proton-Proton Collisions. https://doi.org/10.1088/0954-3899%2F37%2F8%2F083001

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