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14 pages, 732 KiB

Open AccessArticle

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

by Egor Nedorezov, Alexey Aparin, Alexandru Parvan and Vinh Ba Luong

Particles 2025, 8(1), 34; https://doi.org/10.3390/particles8010034 - 19 Mar 2025

Viewed by 426

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. Full article

(This article belongs to the Special Issue Selected Papers from the 13th International Conference on New Frontiers in Physics (ICNFP 2024))

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13 pages, 766 KiB

Open AccessArticle

Elliptic Flow and Its Fluctuations from Transport Models for Au+Au Collisions at

s_{N N}

= 7.7 and 11.5 GeV

by Vinh Ba Luong, Dim Idrisov, Petr Parfenov and Arkadiy Taranenko

Particles 2023, 6(1), 17-29; https://doi.org/10.3390/particles6010002 - 30 Dec 2022

Cited by 3 | Viewed by 2446

Abstract

The elliptic flow

v_{2}

is one of the key observables sensitive to the transport properties of the strongly interacting matter formed in relativistic heavy-ion collisions. In this work, we report on the calculations of

v_{2}

and its fluctuations of charged hadrons [...] Read more.

The elliptic flow

v_{2}

is one of the key observables sensitive to the transport properties of the strongly interacting matter formed in relativistic heavy-ion collisions. In this work, we report on the calculations of

v_{2}

and its fluctuations of charged hadrons produced in Au+Au collisions at center-of-mass energy per nucleon pair

\sqrt{s_{N N}}

= 7.7 and 11.5 GeV from several transport models and provide a direct comparison with published results from the STAR experiment. This study motivates further experimental investigations of

v_{2}

and its fluctuations with the Multi-Purpose Detector (MPD) at the NICA Collider. Full article

(This article belongs to the Special Issue Selected Papers from "Physics Performance Studies at FAIR and NICA")

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13 pages, 824 KiB

Open AccessArticle

Relating Charged Particle Multiplicity to Impact Parameter in Heavy-Ion Collisions at NICA Energies

by Petr Parfenov, Dim Idrisov, Vinh Ba Luong and Arkadiy Taranenko

Particles 2021, 4(2), 275-287; https://doi.org/10.3390/particles4020024 - 4 Jun 2021

Cited by 20 | Viewed by 4505

Abstract

The size and evolution of the matter created in relativistic heavy-ion collisions strongly depend on collision geometry, defined by the impact parameter. However, the impact parameter cannot be measured directly in an experiment but might be inferred from final state observables using the centrality procedure. We present the procedure of centrality determination for the Multi-Purpose Detector (MPD) at the NICA collider and its performance using the multiplicity of produced charged particles at midrapidity. The validity of the procedure is assessed using the simulated data for Au + Au collisions at

\sqrt{s_{N N}}

= 4–11 GeV. Full article

(This article belongs to the Special Issue Analysis Techniques and Physics Performance Studies for FAIR and NICA)

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13 pages, 2175 KiB

Open AccessConference Report

Anisotropic Flow Measurements of Identified Hadrons with MPD Detector at NICA

by Petr Parfenov, Dim Idrisov, Vinh Ba Luong, Nikolay Geraksiev, Anton Truttse and Alexander Demanov

Particles 2021, 4(2), 146-158; https://doi.org/10.3390/particles4020014 - 27 Mar 2021

Cited by 2 | Viewed by 3036

Abstract

The primary scientific mission of the Multi-Purpose Detector (MPD) at the accelerator Nuclotron-based Ion Collider facility (NICA) (Dubna) is to investigate the properties of strongly interacting matter at high net-baryon densities. The goal of this work is to study the performance of the MPD detector for directed and elliptic flow measurements of identified hadrons by using the realistic Monte Carlo simulations of heavy-ion collisions at energies

\sqrt{s_{N N}}

= 4.5 − 11 GeV. Full article

(This article belongs to the Special Issue Analysis Techniques and Physics Performance Studies for FAIR and NICA)

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