Alpha-clustered hypernuclei and chiral SU(3) dynamics

Selected light hypernuclei are studied using an alpha cluster model approach (the Hyper-THSR wave function) in combination with a density-dependent Lambda hyperon-nuclear interaction derived from chiral SU(3) effective field theory. This interaction includes important two-pion exchange processes involving Sigma N intermediate states and associated three-body mechanisms as well as effective mass and surface terms arising in a derivative expansion of the in-medium Lambda selfenergy. Applications and calculated results are presented and discussed for C-13(Lambda) and Be-Lambda(9). The lightest a clustered hypernucleus, He-Lambda(5), is also discussed in this context.