Abstract
We report here the first observation of directed flow () of the hypernuclei and in mid-central collisions at at RHIC. These data are taken as part of the beam energy scan program carried out by the STAR experiment. From events in 5%–40% centrality, about 8400 and 5200 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 slopes of and follow baryon number scaling, implying that the coalescence is the dominant mechanism for these hypernuclei production in the 3 GeV collisions.
- Received 30 November 2022
- Revised 24 January 2023
- Accepted 2 March 2023
DOI:https://doi.org/10.1103/PhysRevLett.130.212301
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