Production of light hypernuclei in Au plus Au collisions at √sNN=3 GeV within a thermodynamic approach

被引：2

作者：

Kozhevnikova, M. ^{[1
]}

Ivanov, Yu. B. ^{[2
,3
]}

机构：

[1] JINR Dubna, Veksler & Baldin Lab High Energy Phys, Dubna 141980, Russia

[2] JINR Dubna, Bogoliubov Lab Theoret Phys, Dubna 141980, Russia

[3] Kurchatov Inst, Natl Res Ctr, Moscow 123182, Russia

来源：

PHYSICAL REVIEW C | 2024年 / 109卷 / 03期

关键词：

HEAVY-ION COLLISIONS; SCALED HADRON MASSES; EQUATION; MODEL; QCD;

D O I：

10.1103/PhysRevC.109.034901

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Simulations of the A-hyperon and light-hypernuclei production in Au+Au collisions at root sNN = 3 GeV were performed within the updated three-fluid hydrodynamics-based event simulator extended by UrQMD (ultrarelativistic quantum molecular dynamics) final state interactions (THESEUS). The light (hyper)nuclei are treated thermodynamically, i.e., they are considered on an equal basis with hadrons. The only additional parameter is related to the late freeze-out that imitates the afterburner stage for the light (hyper)nuclei because UrQMD is not able to dynamically treat them. The calculation of hypernuclei production is the same as that of light nuclei. The hypernuclei results are compared with recent STAR data. It is found that the calculated midrapidity 3AH /A ratio falls within the error bars of the experimental point. It is remarkable that the large difference between the t/p and 3AH/A ratios is reproduced without any additional parameters. Rapidity distributions of 3AH/A and 4AHe /A ratios are predicted. Midrapidity mean transverse momenta of protons, A's and light (hyper)nuclei in central collisions agree well with the data. The calculated directed flow also reasonably well reproduces of the data.

引用

页数：6

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