A Gravitational Theory of the wMeson and Leptons in General (
L. Iotz · 2007
A gravitational theory of leptons is proposed in which the mass of the electron and that of the muon are the roots of a simple quadratic equation. This equation is obtained from the Reissner-Weyl metric for a charged particle by assuming that the gravitational constant suffers a sharp discontinuity at the surface of a particle, and by imposing the condition that dr/dt = 0 along the null line ds ~ 0.