Hypernuclei, bound states of nuclei with one or more hyperons, serve as a natural laboratory to investigate the hyperon-nucleon (-) interaction, an important ingredient for the equation-of-state (EoS) of nuclear matter. Precise measurements of hypernuclei properties and their production yields in heavy-ion collisions are crucial for the understanding of their production mechanisms and the strength of the - interaction. The strangeness population factor, (A=3,4), is of particular interest as it directly relates to the ratio of light nuclei and hypernuclei coalescence parameters . Moreover, it is suggested that might be sensitive to the onset of deconfinement. The STAR Beam Energy Scan II program and isobar collisions offer a great opportunity to investigate energy and system size dependence of hypernuclei production.
In this talk, we present new measurements on transverse momentum (), rapidity\,(), and centrality dependence of , , and production yields in Au+Au collisions from 3 to 27 GeV, as well as in Ru+Ru and Zr+Zr collisions at GeV. Strangeness population factors as functions of collision energy, centrality, , and are also reported. In addition, we present new measurements on and lifetimes. These results are compared with phenomenological model calculations, and the physics implications on the hypernuclei production mechanism and properties of - interaction will be discussed.
