Einstein-Maxwell-Higgs solitons

A regular, localized solution of the classical theory of the gravitational field coupled to the electromagnetic field and to an auxiliary scalar field is presented, and an analytical form of this solution is obtained in a limiting case. This solution, which is interpreted, from the macroscopic point of view, as an extended charged particle, has a peculiar microscopic topology characterized by a fundamental length of the order of the classical electromagnetic radius of the particle. There is no lower limit to the mass-to-charge ratio of such a particle. (author)