Collective flow of light nuclei and hyper-nuclei in Au+Au collisions at $\sqrt{s_{NN}}$ = 3, 14.6, 19.6, 27, and 54.4 GeV using the STAR detector

TL;DR

This paper investigates the collective flow behavior of light nuclei and hyper-nuclei in heavy-ion collisions at various energies, revealing scaling patterns and first observations of hyper-nuclei flow, advancing understanding of their production mechanisms.

Contribution

It provides new measurements of elliptic and directed flow of light nuclei and hyper-nuclei across multiple energies, including the first hyper-nuclei flow observation at 3 GeV.

Findings

Mass number scaling of $v_2(p_T)$ observed for light nuclei.

First measurement of hyper-nuclei $^{3}_{ ext{Λ}}$H and $^{4}_{ ext{Λ}}$H directed flow.

Elliptic flow dependence on transverse momentum and centrality analyzed.

Abstract

Light nuclei and hyper-nuclei are produced in abundance in heavy-ion collisions. The production mechanism of these species in heavy-ion collisions still remains to be understood. In these proceedings, we report the transverse momentum and centrality dependence of elliptic flow ($v_2$) of $d$, $t$, and $^3\text{He}$ in Au+Au collisions at $\sqrt{s_{NN}}$ = 14.6, 19.6, 27, and 54.4 GeV. Mass number scaling of $v_2(p_T)$ of light nuclei is shown. We also report the first observation of hyper-nuclei $^{3}_{\Lambda}$H and $^{4}_{\Lambda}$H directed flow ($v_1$) in $\sqrt{s_{NN}}$ = 3 GeV mid-central (5-40\%) Au+Au collisions in the fixed target mode.