3–7 juin 2024
Université de Strasbourg / Palais de la Musique et des Congrès
Fuseau horaire Europe/Paris

Directed Flow of $\Lambda$, $^{3}_{\Lambda}{\rm H}$, and $^{4}_{\Lambda}{\rm H}$ in Au+Au collisions at $\sqrt{s_{NN}}$ = 3.2, 3.5, 3.9 and 4.5 GeV at RHIC

4 juin 2024, 17:50
20m
Room Londres 1 (Palais de la Musique et des Congrès)

Room Londres 1

Palais de la Musique et des Congrès

Talk Strangeness in Astrophysics, Other topics Track7-OthTop

Orateur

Junyi Han

Description

Studying hyper-nuclei production 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 this presentation, we will show a systematic study on energy dependence of the directed flow for $\Lambda$ and hyper-nuclei ($^{3}_{\Lambda}{\rm H}$, $^{4}_{\Lambda}{\rm H}$) from mid-central Au+Au collisions at $\sqrt{s_{NN}}$ = 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 $v_{1}$ is studied in mid-central collisions. The extracted $v_{1}$ slopes ($dv_{1}/dy|_{y=0}$) of the hyper-nuclei are positive and decrease gradually as the collision energy increases. These hyper-nuclei results will be compared to that of light-nuclei including p, d, t/$\rm ^{3}He$ and $\rm ^{4}He$. Finally, discussions will be made using comparison to hadronic transport model including coalescence after-burner calculations.

Auteur principal

Co-auteur

Sooraj Radhakrishnan (Kent State University/Lawrence Berkeley National Laboratory)

Documents de présentation

Examen par les pairs

Article