We know since the 1930's that the energy of which the rest mass of the electron is made is electromagnetic, because electrons come into being with a companion positron by means of the decoupling of electromagnetic photons of 1.022 MeV energy or more, that is, twice the 0.511 MeV of which the invariant rest mass of the electron is made. The only difference between an electron and a positron is the sign of their charge.
The decoupling mechanics of such a 1.022 MeV photon into a pair of electron-positron is analyzed in this reference:
Article The Mechanics of Electron-Positron Pair Creation in the 3-Spaces Model
All formal references to the original discoveries are provided.
according to a photon loop model of mine, which I was trying to publish peer reviewed in 2000-2003, and in 2021 all spin 1/2 particles are build so, incl. "quarks". Using just optical Doppler I v'got all attributes, rest mass, and relativistic mass and impuls momentum. exactly. kinetic energy and discovered a unknown energy capacity effect of photon and fermions by factor 2 at high speed near c.
Preprint Kinetic capacity effect of photons and rest mass particles, ...
Preprint Half photon effect discovered for mass particles: kinetic ca...
Established physics is refusing all new ideas, defeating against "bad ideas" the exisiting standard models. I 'v got presented "arguments", that "we don't need another harmful ideas". My question, how science ideas can be "harmful" was left alone.