Light Nuclei and Hyper Nuclei Collectivity Measurements at High Baryon Density Region

TL;DR

This paper reviews recent measurements of light nuclei and hyper nuclei collective flow in high baryon density heavy-ion collisions, highlighting their production mechanisms and implications for nucleon interactions.

Contribution

It provides a comprehensive review of experimental data on light nuclei flow and introduces the first hyper nuclei flow measurement at 3 GeV, suggesting coalescence formation.

Findings

Light nuclei exhibit measurable directed and elliptic flow.

Hyper nuclei $v_1$ measured at 3 GeV suggests coalescence formation.

Comparison with models helps understand production mechanisms.

Abstract

High energy heavy-ion collisions produce large amounts of light nuclei and hype nuclei, especially at high baryon density around collision energy of several GeV. These light nuclei and hyper nuclei carry the information of nucleon-nucleon and hyperon-nucleon interactions and affect the chemical composition and properties of the collision system. This proceeding is a brief review for the recent measurements on light nuclei collective flow, including directed flow $v_1$, elliptic flow $v_2$, and high order flow coefficients, at finite and high baryon densities from different experiments. The light nuclei production mechanism is discussed based on comparisons of the measurements and model calculations. The first measurement for hyper nuclei $v_1$ at 3 GeV by STAR is also reported, which may imply the hyper nuclei are formed via the coalescence of nucleons and hyperon.