Collision Energy Dependence of Hypertriton Production in Au+Au Collisions at RHIC

Hypernuclei are bound states of nucleons and at least one hyperon. In particular, the hypertriton _Λ³H, a bound state consisting of a proton, neutron and hyperon, is the lightest known hypernucleus. Precise measurements on the energy dependence of _Λ³H production will give invaluable information on hypernuclei production mechanisms due to its unique intrinsic properties. The second phase of the Beam Energy Scan (BES-II) at RHIC provides a great opportunity to study hypernuclei production. In these proceedings, we present p_T-integrated yields (dN/dy) at mid-rapidity, yield ratios and average transverse momentum (<p_T>) of _Λ³H as a function of collision energy in Au+Au collisions from √s_NN = 3 to 27 GeV. These results are compared with phenomenological model calculations, and physics implications on production mechanism are discussed.