Re: Antimatter in the universe? (was "A question about mirrors")

[Jack Uretsky <jlu@HEP.ANL.GOV>]

Well, yes and no.  Parity violation is seen in atomic EM transitions as
a result of interference between the EM current and the weak neutral
current - the Z-boson behaves like a heavy photon with (1+gamma_5)
coupling.  See Weinberg, Vol. 2, Chap. 21.3.
                                        Regards,
                                                Jack

Adam was by constitution and proclivity a scientist; I was the same, and
we loved to call ourselves by that great name...Our first memorable
scientific discovery was the law that water and like fluids run downhill,
not up.
                          Mark Twain, <Extract from Eve's Autobiography>

On Fri, 4 Aug 2000, Herb Schulz wrote:

> > In the late fifties P was shown to be violated in the famous
> > experiment of Wu et al, as we've been reminded here. A decade later
> > T was shown to be independently unsymmetrical in Nature, and by the
> > "CPT theorem" (which, being a theorem, I assume is absolutely true)
> > C must, therefore, not be a symmetry of Nature. Please correct any
> > misconceptions that might be evident in what I've written. If C is
> > not a symmetry of Nature (or, more properly, Natural law) then is
> > there hope that one might observe the electromagnetic radiation from
> > distant galaxies and discern some distinctive difference due to the
> > type of matter of which the galaxy is composed?
>
> Howdy,
>
> My impression was that P, C and therefor T violation (assuming CPT is
> conserved) are a consequence of the weak interaction; the
> electromagnetic interaction (at least to the first or second order?)
> conserves P, C and T.  If that is true then you shouldn't be able to
> distinguish anti-matter and matter via electromagnetic radiation.
> You'd have to use the weak interaction; e.g., looking at the
> anti-neutrinos, etc., as you stated.
>
> Good Luck,
> --
> Herb Schulz
> (herbs@interaccess.com)