2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/52220We study a general relativistic particle action obtained by incorporating the Hamiltonian constraints into the formalism as a toy model for general relativity and string theory. We show how a non-vanishing cosmological constant and a weakening of gravity at short distances may be interpreted as evidences for the existence of gravitational dipoles.Latex, no figures, new equationsHigh Energy Physics - Theorytext