Estimation of multi-particle correlation from multiplicity distribution observed in relativisitic heavy ion collisions

TL;DR

This paper derives an analytical formula for multiplicity distributions in heavy ion and proton-proton collisions, enabling estimation of chaoticity parameters and comparison with two-particle correlation analyses.

Contribution

It introduces a new analytical formula within the QO approach that accounts for chaotic and coherent fields in multiplicity distributions.

Findings

Chaoticity parameters estimated from multiplicity distributions.

Comparison of chaoticity parameters with two-particle correlation results.

Application to Au+Au and pp collision data.

Abstract

Analytical formula for multiplicity distribution is derived in the QO approach, where chaotic and coherent fields are contained. Observed charged multiplicity distributions in Au+Au collisions at $\sqrt{s}=200$ AGeV and in pp collisions at $\sqrt{s}=900$ GeV are analyzed by the formula. Chaoticity parameters in the inclusive events estimated from the analysis of multiplicity distributions are compared with those estimated from the analysis of observed two-particle inclusive identical particle correlations.