Psi-class intersections on Hassett spaces for genus 0 with all weights 1/2

Hassett spaces are moduli spaces of weighted stable pointed curves. We consider such spaces of curves of genus $0$ with weights all 1/2. These spaces are interesting, since they are isomorphic to M̄0,n but have different universal families and different intersection theory. We develop a closed formula for intersections of ψ-classes on such spaces. In our main result, we encode the formula for top intersections in a generating function obtained by applying a differential operator to the Witten potential.