Work

A System Size Analysis of the Fireball Produced in Heavy-Ion Collisions

Year: 2025

Type: article

Abstract: One of the main interests of high-energy physics is the study of the phase diagram and the localization of phase transitions from hadronic to quark–gluonic matter. There are different techniques to study the hot matter. One of them is femtoscopy, which uses two-particle correlations to extract spatiotemporal characteristics of the emission source. Another approach involves obtaining thermodynamic parameters from the momentum distributions of produced particles based on various theoretical models. In this research, we perform a comparative analysis of femtoscopic volumes and volumes obtained using the Tsallis statistical fit. This analysis allows us to estimate system size at the time of kinetic freeze-out and its dependence on collision centrality and energy. We observe that at high energies, the volume values estimated taking the two approaches diverge significantly, while at low energies, they are more consistent. In the future, these results can help to combine these two different methods and provide a more comprehensive picture of the fireball produced in heavy-ion collisions.

Source: Particles

DOI: 10.3390/particles8010034

Authors: Egor Nedorezov, Alexey Aparin, Alexandru Parvan, Vinh Ba Luong

Institutions: Lomonosov Moscow State University, Joint Institute for Nuclear Research, Horia Hulubei National Institute for R and D in Physics and Nuclear Engineering, Dalat Nuclear Research Institute

Language: English

Topic: High-Energy Particle Collisions Research

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,930

Funder: Russian Science Foundation