Measurements of Light Nuclei (d, t, ${}^3$He)-$\Lambda$ Correlations in Au+Au Collisions at $\sqrt{s_{NN}}=3$ GeV from STAR

Abstract

Heavy-ion collisions offer a unique way to study hyperon-nucleon ($Y$-$N$) interactions through two-particle momentum correlations, which reveal the source's space-time structure and the effects of the final state interactions. Correlations between light nuclei (d, t, ${}^3$He) and $\Lambda$ provide insight into hypernuclei structure, binding energies, and many-body interactions that might be relevant to the inner structure of neutron stars. This work presents the first measurements of d-$\Lambda$, t-$\Lambda$, and ${}^3$He-$\Lambda$ correlations from $\sqrt{s_{{}_{\mathrm{NN}}}}=3$ GeV Au+Au collisions collected in 2021 at STAR. Using the Lednicky-Lyuboshitz model, we extract source sizes and interaction parameters, shedding light on hyperon interactions and light hypernuclei structure.

4 pages, 4 figures, Proceedings of Quark Matter 2025