2025/10/27 by Zhou, Yingjie
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Nuclear Experiment (nucl-ex)
paper · doi:10.48550/arxiv.2510.23281
Hypernuclei are bound states of hyperons (Y) and nucleons (N). Measurements on their yields can help us investigate their production mechanisms. In particular, the 5ΛHe and 4ΛH(e) are substantially tighter bound compared to the 3ΛH. The large radius of the 3ΛH leads to suppression in coalescence models, but not in the thermal model where the size of the nucleus does not play a role. As such, studying the A=3--5 hypernuclei yields allow us to extract information on the effects of hypernuclear binding on hypernuclei production in heavy-ion collisions. In these proceedings, we present measurements of 5ΛHe yields in Au+Au collisions at √s\rm NN=3.0 GeV, 4ΛH(e) yields in Au+Au collisions at √s\rm NN=3.0--4.5 GeV, and 3ΛH yields in Au+Au collisions at √s\rm NN=3--27 GeV. Results on the directed flow of hypernuclei are also reported. The physics implications of these measurements are discussed.