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Observation of Directed Flow of Hypernuclei $^3_Λ$H and $^4_Λ$H in $\sqrt{s_{\rm NN}}$ = 3 GeV Au+Au Collisions at RHIC
- Publication Year :
- 2022
- Publisher :
- arXiv, 2022.
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Abstract
- We report here the first observation of directed flow ($v_1$) of the hypernuclei $^3_Λ$H and $^4_Λ$H in mid-central Au+Au collisions at $\sqrt{s_{\rm NN}}$ = 3 GeV at RHIC. These data are taken as part of the beam energy scan program carried out by the STAR experiment. From 165 $\times$ 10$^{6}$ events in 5%-40% centrality, about 8400 $^3_Λ$H and 5200 $^4_Λ$H candidates are reconstructed through two- and three-body decay channels. We observe that these hypernuclei exhibit significant directed flow. Comparing to that of light nuclei, it is found that the midrapidity $v_1$ slopes of $^3_Λ$H and $^4_Λ$H follow baryon number scaling, implying that the coalescence is the dominant mechanism for these hypernuclei production in such collisions.<br />5pages, 4 figures. Supplemental material: 6 pages, 5 figures
- Subjects :
- FOS: Physical sciences
Nuclear Experiment (nucl-ex)
Subjects
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi...........216211101a0aa0fcb33a69efa3aa42ec
- Full Text :
- https://doi.org/10.48550/arxiv.2211.16981