Measurements of the lightest hypernucleus ($\mathrm{^3_{\Lambda}H}$): progress and perspective

Author:

Jinhui Chen, Xin Dong, Yu-Gang Ma, Zhangbu Xu

Keyword:

Nuclear Experiment, Nuclear Experiment (nucl-ex), Nuclear Theory (nucl-th)

journal:

date:

2023-11-16 00:00:00

Abstract

The hyperon-nucleon ($Y$-$N$) interaction is important for the description of the equation-of-state of high baryon density matter. Hypernuclei, the cluster object of nucleons and hyperons, serve as cornerstones of a full understanding of the $Y$-$N$ interaction. Recent measurements of the lightest known hypernucleus, the hypertriton's ($\mathrm{^3_{\Lambda}H}$) and anti-hypertriton's ($\mathrm{^3_{\bar{\Lambda}}\bar{H}}$) lifetime, mass and $\Lambda$ separation energy have attracted interests on the subject. Its cross section and collective flow parameters have also been measured in heavy-ion collisions, which have revealed new features on its production mechanism. In this article we summarise recent measurements of $\mathrm{^3_{\Lambda}H}$, focusing on the heavy-ion collisions. We will discuss their implications for the $\mathrm{^3_{\Lambda}H}$ properties and the constrains on the $Y$-$N$ interaction models.

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