Issue |
EPJ Web Conf.
Volume 316, 2025
The 21st International Conference on Strangeness in Quark Matter (SQM 2024)
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|
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Article Number | 07008 | |
Number of page(s) | 4 | |
Section | Detector Upgrades, Future Experiments and Other Topics | |
DOI | https://doi.org/10.1051/epjconf/202531607008 | |
Published online | 27 January 2025 |
https://doi.org/10.1051/epjconf/202531607008
Directed Flow of Λ, Λ3H and Λ4H in Au+Au collisions at √sNN = 3.2, 3.5, 3.9 and 4.5 GeV at RHIC
1 Central China Normal University
2 Heidelberg University
* e-mail: JYHan@mails.ccnu.edu.cn
Published online: 27 January 2025
Studying hyper-nuclei yields and their collectivity can shed light on their production mechanism as well as the hyperon-nucleon interactions. Heavy-ion collisions from the RHIC beam energy scan phase II (BES-II) provide an unique opportunity to understand these at high baryon densities. In these proceedings, we present a systematic study on energy dependence of the directed flow (v1) for Λ and hyper-nuclei (3ΛH and 4ΛH) from mid-central Au+Au collisions at √sNN = 3.2, 3.5, 3.9 and 4.5 GeV, collected by the STAR experiment with the fixed-target mode during BES-II. The rapidity (y) dependence of the hyper-nuclei v1 is studied in mid-central collisions. The extracted v1 slopes (dv1/dy|y=0) of the hyper-nuclei are positive and decrease gradually as the collision energy increases. These hyper-nuclei results are compared to that of light-nuclei including p, d, t/3He and 4He. Finally, these results are compared with a hadronic transport model including coalescence after-burner.
© The Authors, published by EDP Sciences, 2025
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