Superposition models and the multiplicity fluctuations in heavy ion collisions

Abstract

A class of simple superposition models based on the Glauber picture of multiple collisions is compared with the data on the centrality dependence of the multiplicity distributions in a central rapidity bin. We show how the results depend on the specific assumptions concerning the distributions in the number of participants and their relations to the distributions of the number of produced hadrons in various phase space bins. None of the versions of the model describes satisfactorily the centrality dependence of the scaled dispersion.

9 pages, 5 figures, a misprint in formula corrected, accepted for publication in EPJA

References in corpus (6)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• Nucleon participants or quark participants?
• Charged hadron multiplicity fluctuations in Au+Au and Cu+Cu collisions from sqrt(s_NN) = 22.5 to 200 GeV
• Constituent quark and diquark properties from small angle proton-proton elastic scattering at high energies
• Heavy ion collisions in the used nucleon model

Cited by in corpus (4)

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• A systematic study of the initial state in heavy ion collisions based on the quark participant assumption
• Forward-backward correlations with the $\Sigma$ quantity in the wounded constituent framework at LHC energies