  The rest masses of the electron, the muon and of the stable mesons and
baryons can be explained, within 1% accuracy, with the standing wave model,
which uses only photons, neutrinos, charge and the weak nuclear force. We do
not need hypothetical particles for the explanation of the masses of the
electron, muon, mesons and baryons.
  We can also explain the charge of the electron, the spin of the electron, of
the muon and of the stable baryons, without any additional assumption. We also
have determined the rest masses of the electron-, muon- and tau neutrinos and
found that the mass of the electron neutrino is equal to the fine structure
constant times the mass of the muon neutrino.
