Speaker
Description
Studying hyper-nuclei production and their collectivity can shed light on their production mechanism as well as the hyperon-nucleon interactions under finite pressure. This is a unique opportunity for heavy-ion collisions at high baryon density region where hypernuclei production rate increases.
In this poster, we will present $v_{1}$ of the hyper-nuclei ($\Lambda$, $^{3}_{\Lambda}{\rm H}$, $^{4}_{\Lambda}{\rm H}$) from mid-central Au+Au collisions at $\sqrt{s_{NN}}$ = 3.2, 3.5, and 3.9 GeV, collected by the STAR experiment with the fixed-target mode during the second phase of the RHIC beam energy scan program. The rapidity dependence of the hyper-nuclei directed flow ($v_{1}$) is studied in mid-central collisions. The extracted $v_{1}$ slopes of the hyper-nuclei are positive and decrease gradually as the collision energy increases. The results will be compared with models using the framework of hadronic transport and a coalescence after-burner.
| Category | Experiment |
|---|---|
| Collaboration (if applicable) | RHIC-STAR |
