  We propose that charged leptons are the `baryons' of the gauge dynamics
subject to a SU(2)$_{e}$$\timesSU(2)_{\mu}\timesSU(2)_{\tau}$ symmetry. The
`mesons' of this theory are neutral and thus candidates for dark matter. There
is, in addition, a gauge group SU(2)$_{\tiny{CMB}}$ generating the CMB photon.
We {\sl compute} the value of $\alpha_{\tiny{em}}$ and the contribution to
$\La_{\tiny{cosmo}}$ coming from SU(2)$_{\tiny{CMB}}$. We qualitatively explain
the occurrence of dark matter, large intergalactic magnetic fields, a lepton
asymmtry, the stability of $T_{\tiny{CMB}}$, and the deviation from thermal QED
behavior of hot plasmas present in the interior of the sun and terrestial
nuclear fusion experiments.

High Energy Physics - Phenomenology