Resonance decay effect on conserved number fluctuations in a hadron resonance gas model

TL;DR

This paper investigates how resonance decay, including weak decays and kinematic cuts, influences conserved number fluctuations in heavy-ion collisions, showing that the HRG model aligns well with experimental data.

Contribution

It highlights the importance of including weak decays and kinematic cuts in the HRG model to accurately reproduce experimental fluctuations.

Findings

Good agreement between HRG model and experimental data for net-proton fluctuations.

Resonance decay effects significantly impact conserved number fluctuations.

Including weak decays improves the model's accuracy.

Abstract

We study the effect of charged secondaries coming from resonance decay on the net-baryon, net-charge and net-strangeness fluctuations in high energy heavy-ion collisions within the hadron resonance gas (HRG) model. We emphasize the importance of including weak decays along with other resonance decays in the HRG, while comparing with the experimental observables. The effect of kinematic cuts on resonances and primordial particles on the conserved number fluctuations are also studied. The HRG model calculations with the inclusion of resonance decays and kinematical cuts are compared with the recent experimental data from STAR and PHENIX experiments. We find a good agreement between our model calculations and the experimental measurements for both net-proton and net-charge distributions.