Benchmark of initial state models for heavy-ion collisions at (s_NN)^{1/2}=27 and 62 GeV

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F21%3A00349572" target="_blank" >RIV/68407700:21340/21:00349572 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1103/PhysRevC.103.034902" target="_blank" >https://doi.org/10.1103/PhysRevC.103.034902</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevC.103.034902" target="_blank" >10.1103/PhysRevC.103.034902</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Benchmark of initial state models for heavy-ion collisions at (s_NN)^{1/2}=27 and 62 GeV

Popis výsledku v původním jazyce

Description of relativistic heavy-ion collisions at the energies of the BNL Relativistic Heavy Ion Collider (RHIC) Beam Energy Scan program with fluid dynamic approach poses several challenges, one of which being a complex geometry and a longer duration of the prehydrodynamic stage. Therefore, existing fluid dynamic models for heavy-ion collisions at the RHIC Beam Energy Scan energies rely on rather complex initial states, such as urqmd cascade or multifluid dynamics. In this study, we show that functionally simpler, nondynamical initial states can be employed for the fluid-dynamical simulations of Au-Au collisions at sNN=27 and 62.4 GeV. We adapt the initial states based on the Monte Carlo Glauber model (glissando 2) and T_A T_B ansatz based on reduced thickness (trento p=0), extended into the longitudinal direction and finite baryon density. We find that both initial states, when coupled to a three-dimensional event-by-event viscous fluid dynamic + cascade model, result in an overall fair reproduction of basic experimental data: pseudorapidity distributions, transverse momentum spectra, and elliptic flow, at both collision energies. This is rather surprising given that the T_A T_B ansatz is functionally similar to the EKRT and IP-Glasma models, which are successful at much larger energies and rely on a partonic picture of the initial state.

Název v anglickém jazyce

Benchmark of initial state models for heavy-ion collisions at (s_NN)^{1/2}=27 and 62 GeV

Popis výsledku anglicky

Description of relativistic heavy-ion collisions at the energies of the BNL Relativistic Heavy Ion Collider (RHIC) Beam Energy Scan program with fluid dynamic approach poses several challenges, one of which being a complex geometry and a longer duration of the prehydrodynamic stage. Therefore, existing fluid dynamic models for heavy-ion collisions at the RHIC Beam Energy Scan energies rely on rather complex initial states, such as urqmd cascade or multifluid dynamics. In this study, we show that functionally simpler, nondynamical initial states can be employed for the fluid-dynamical simulations of Au-Au collisions at sNN=27 and 62.4 GeV. We adapt the initial states based on the Monte Carlo Glauber model (glissando 2) and T_A T_B ansatz based on reduced thickness (trento p=0), extended into the longitudinal direction and finite baryon density. We find that both initial states, when coupled to a three-dimensional event-by-event viscous fluid dynamic + cascade model, result in an overall fair reproduction of basic experimental data: pseudorapidity distributions, transverse momentum spectra, and elliptic flow, at both collision energies. This is rather surprising given that the T_A T_B ansatz is functionally similar to the EKRT and IP-Glasma models, which are successful at much larger energies and rely on a partonic picture of the initial state.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10304 - Nuclear physics

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

PHYSICAL REVIEW C

ISSN

2469-9985

e-ISSN

2469-9993

Svazek periodika

103

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

—

Kód UT WoS článku

000627565700004

EID výsledku v databázi Scopus

2-s2.0-85102937508