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arXiv · 2204.07181

Cumulants of conserved charges in hydrodynamic simulations

Renan Hirayama·Frederique Grassi·Willian Matioli Serenone·Jean-Yves Ollitrault
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Abstract

We introduce a fast and simple method of computing cumulants of net-proton or net-charge fluctuations in event-by-event hydrodynamic simulations of heavy-ion collisions. One evaluates the mean numbers of particles in every hydrodynamic event. Cumulants are then expressed as a function of these mean numbers. We implement the corrections due to global conservation laws. The method is tested using ideal hydrodynamic simulations of Au+Au collisions at $\sqrt{s_{NN}}=200$ AGeV with the NeXSPheRIO code. Results are in good agreement with experimental data on net-proton and net-charge fluctuations by the STAR collaboration.

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Renan Hirayama, Frederique Grassi, Willian Matioli Serenone, Jean-Yves Ollitrault. 2022-04-14. Cumulants of conserved charges in hydrodynamic simulations. https://doi.org/10.1103/physrevc.107.024910

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