Speaker
Description
Hypernuclei are bound states of nuclei with one or more hyperons. Precise measurements of hypernuclei properties and their production yields in heavy-ion collisions are crucial for the understanding of their production mechanisms. The strangeness population factor, $S_{\rm A}=(^{A}_{\Lambda}\mathrm{H}/^{A}\mathrm{He})/(\Lambda/p)$ (A=3,4), is directly related to the ratio of light nuclei and hypernuclei coalescence parameters $B_{A}$. It eliminates canonical correction factors for strangeness and is independent of the chemical potential of the produced medium.
The STAR Beam Energy Scan II program offers us a great opportunity to investigate collision energy and system size dependence of hypernuclei production.
In this poster, we present new measurements on transverse momentum ($p_T$), rapidity\,($y$), and centrality dependence of $\rm ^{3}_{\Lambda}H$ production yields in Au+Au collisions from $\sqrt{s_{\rm NN}}=$ 3 to 7.7 GeV. Strangeness population factors $S_{3}$ and $S_{4}$ as functions of collision energy, centrality, $p_T$, and $y$ will be reported. These results are compared with phenomenological model calculations, and physics implications on the hypernuclei production mechanism will also be discussed.
| Category | Experiment |
|---|---|
| Collaboration (if applicable) | The STAR collaboration |
