Cumulants of net-charge distribution from particle-antiparticle sources

TL;DR

This paper demonstrates how high-order cumulants of net-charge distributions in high-energy collisions can be derived from lower-order terms assuming independent particle-antiparticle production, providing baseline estimates for experimental fluctuation measurements.

Contribution

It introduces a method to express high-order cumulants of net-charge distributions using lower-order terms under a specific production assumption, validated with the HIJING model.

Findings

The assumption holds for net-proton fluctuations without critical behavior.

Derived cumulant estimates serve as baselines for experimental data.

Validation with HIJING supports the method's applicability.

Abstract

It is shown how high-order cumulants of net-charge distribution in hadronic collisions at LHC energies can be expressed via lower-order terms under the assumption that particle-antiparticle pairs are produced in independent local processes. It is argued and tested with HIJING model that this assumption is typically valid for net-proton fluctuations in the case when no critical behaviour is present in the system. Values estimated in such a way can be considered as baselines for direct measurements of high-order net-charge fluctuations in real data.