Speaker
Description
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 this presentation, we report on the directed flow ($v_{1}$) and the elliptic flow ($v_{2}$) of hyper-nuclei, including $\Lambda$, $^{3}_{\Lambda}{\rm H}$, $^{4}_{\Lambda}{\rm H}$ and $^{4}_{\Lambda}{\rm He}$, using approximately 2 billion minimum-bias events from Au+Au collisions at $\sqrt{s_{NN}}$ = 3.0 GeV, collected by the STAR experiment in the fixed-target mode during BES-II. The large event statistics will enable detailed differential flow measurements of hyper-nuclei in rapidity (y) and transverse momentum ($p_{\rm{T}}$), and extend $v_{2}$ measurements to $^{3}_{\Lambda}{\rm H}$, $^{4}_{\Lambda}{\rm H}$ and $^{4}_{\Lambda}{\rm He}$. These hyper-nuclei results are compared to that of light-nuclei including p, d, t, $\rm ^{3}He$ and $\rm ^{4}He$. Finally, these results are compared with calculations from a hadronic transport model.
