2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/187346For quantum systems with two dimensional configuration space we construct a physical radial momentum observable. Rescaling the radius we find the dilatonic degrees of freedom form a Weyl algebra. With this we construct the radial Wigner quasi-probability distribution function.4 pages, LaTeX with revtex, epsfig, multicol. Submitted to PRLQuantum Physicstext