Speaker
Description
We study the productions of $\Lambda$-hypernuclei $^3_{\Lambda}$H, $^4_{\Lambda}$H and $^4_{\Lambda}$He in the coalescence mechanism in Au-Au collisions at $\sqrt{s_{NN}}=3$ GeV.
Considering the abundance and great importance of baryons and light (hyper-)nuclei on the collision dynamics, we include not only nucleon$+\Lambda$ coalescence but also nucleus+nucleon($\Lambda$) coalescence.
We present contributions from different coalescence channels for $^3_{\Lambda}$H, $^4_{\Lambda}$H and $^4_{\Lambda}$He in their productions.
We predict the production asymmetry between $^4_{\Lambda}$H and $^4_{\Lambda}$He, characterized by yield ratios $^4_{\Lambda}\text{He}/^4_{\Lambda}\text{H}$ and $(^4_{\Lambda}\text{H}-^4_{\Lambda}\text{He})/(^4_{\Lambda}\text{H}+^4_{\Lambda}\text{He})$, which can shed light on the existence constraints of the possible neutron-$\Lambda$ bound states $^2_{\Lambda}n~(n\Lambda)$ and $^3_{\Lambda}n~(nn\Lambda)$.
| 请选择分会 | 高能重离子物理 |
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