Isolating dynamical net-charge fluctuations

TL;DR

This paper introduces dynamical cumulants, a new way to measure net-charge fluctuations that effectively isolates true dynamical effects from trivial correlations, validated through simulations and RHIC data comparison.

Contribution

The paper proposes dynamical cumulants, a novel statistical measure that isolates genuine dynamical fluctuations from trivial correlations in net-charge fluctuation analysis.

Findings

Dynamical cumulants are robust against volume fluctuations and charge conservation effects.

Monte Carlo simulations confirm the effectiveness of dynamical cumulants.

Results align well with RHIC experimental data.

Abstract

We modify the usual definitions of cumulants of net-charge fluctuations in a way that isolates dynamical fluctuations. The new observables, which we call dynamical cumulants, are robust with respect to trivial correlations induced by volume fluctuations and global charge conservation. We illustrate the potential of dynamical cumulants by carrying out Monte Carlo simulations where all correlations are trivial. The results of our simulations agree well with Relativistic Heavy Ion Collider (RHIC) data, and are used to illustrate that dynamical cumulants consistently isolate dynamical fluctuations.