Abstract
The Unified Electro-Gravity (UEG) theory, originally developed to self-consistently model a stable structure of the electron, is generalized to model a variety of composite charged as well as neutral particles, which may constitute all known elementary particles in the standard model of particle physics. A direct extension of the UEG theory for the electron is possible by modifying the functional dependence between the electro-gravitational field and the energy density, which would lead to a general class of basic charged particles carrying different levels of mass/energy, with the electron mass at the lowest level. The basic theory may also be extended to model simple composite neutral particles, consisting of two layers of surface charges of equal magnitudes but opposite signs. The model may be similarly generalized to synthesize more complex structures of composite charged or neutral particles, consisting of increasing levels of charged layers. Depending upon its specific basic or composite structure, a particle could be highly stable like an electron or a proton, or relatively unstable in different degrees, which may be identified with other known particles of the standard model of particle physics. The generalized UEG theory would provide a new unified model for particle physics, as a potential new paradigm that would complement and apply beyond the standard model of particle physics currently used.