Speaker
Description
Hypernuclei are bound states of nucleons and hyperons. Precise measurements of hypernuclei properties and production yields can shed light on the poorly understood hyperon$-$nucleon (Y-N) interaction and production mechanisms of hypernuclei.
Thanks to the high statistics data and low collision energies, the STAR beam energy scan phase-II program provides a great opportunity to study hypernuclei production. In this presentation, we will report production yields of $^3_{\Lambda}$H, $^4_{\Lambda}$H in Au+Au collisions at $\sqrt{s_{NN}}$ = 3, 19.6, and 27 GeV. The strangeness population factors ${\rm(S_A=^A_{\Lambda}H/(^A{He}\times\frac{\Lambda}{p}))}$, $S_3$ and $S_4$, and A=4 hypernuclei yield ratio $(^4_{\Lambda}$He/$^4_{\Lambda}$H$)$ will also be presented. We will also report precise measurements of $^3_{\Lambda}$H branching ratio and lifetimes of light hypernuclei. The results will be compared with model calculations and physics implications will be discussed.
| Theory / experiment | Experiment |
|---|---|
| Group or collaboration name | the STAR Collaboration |
